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Articles 1 - 30 of 218

Full-Text Articles in Engineering

Properties And Performance Of The Basalt-Fiber Reinforced Texture Roof Tiles, Parinya Chakartnarodom, Wichit Prakaypan, Pitcharat Ineure, Nutthita Chuankrerkkul, Edward A. Laitila, Nuntaporn Kongkajun Dec 2020

Properties And Performance Of The Basalt-Fiber Reinforced Texture Roof Tiles, Parinya Chakartnarodom, Wichit Prakaypan, Pitcharat Ineure, Nutthita Chuankrerkkul, Edward A. Laitila, Nuntaporn Kongkajun

Michigan Tech Publications

The mechanical and the physical properties, and the performance of texture roof tiles reinforced with the basalt fibers were observed. The samples of the basalt-fiber reinforced texture roof tiles were produced on the industrial scale by using filter pressing method. After forming, the as-molded samples were air cured and characterized based on ASTM C1185 standard for their mechanical properties and physical properties. In addition, the roof-tile installation test was also performed. The results showed that the samples of the basalt-fiber reinforced texture roof tile (BFRT) could be produced on the industrial scale by using the common setting of the forming ...


The Effect Of Compaction Temperature And Pressure On Mechanical Properties Of 3d Printed Short Glass Fiber Composites, Pushpashree Jain Ajith Kumar Jain Dec 2020

The Effect Of Compaction Temperature And Pressure On Mechanical Properties Of 3d Printed Short Glass Fiber Composites, Pushpashree Jain Ajith Kumar Jain

Mechanical & Aerospace Engineering Theses & Dissertations

Among many thermoplastics that are used in engineering, polyamide 6 (nylon 6) is an extremely versatile engineering thermoplastic. Nylon filled with glass fibers has higher mechanical strength and high wear resistance than general purpose nylon. 3D printed composites, based on fused filament modeling, typically suffer from poor bead-to-bead bonding and relatively high void content, limiting their mechanical properties

This thesis explores the effect of compaction pressure and temperature on improving the mechanical properties of 3D printed composites. Engineering moduli in the printing and transverse to printing direction, as well as ultimate strength were measured using the tensile testing with Digital ...


Design And Performance Of Polyurethane Elastomers Composed With Different Soft Segments, Xin Jin, Naisheng Guo, Zhanping You, Yiqiu Tan Nov 2020

Design And Performance Of Polyurethane Elastomers Composed With Different Soft Segments, Xin Jin, Naisheng Guo, Zhanping You, Yiqiu Tan

Michigan Tech Publications

Thermoplastic polyurethane elastomers (TPUs) are widely used in a variety of applications as a result of flexible and superior performance. However, few scholars pay close attention on the design and synthesis of TPUs through the self‐determined laboratory process, especially on definite of chemical structures and upon the influence on properties. To investigate the properties of synthesized modifier based on chemical structure, firstly each kind of unknown structure and composition ratio of TPUs was determined by using a new method. Furthermore, the thermal characteristics and mechanical properties of modifiers were exposed by thermal characteristics and mechanics performance tests. The experimental ...


Enhanced Mechanical Properties And Thermal Shock Resistance Of Si2Bc3N Ceramics With Sic Coated Mwcnts, Ning Liao, Dechang Jia, Zhihua Yang, Yu Zhou Oct 2020

Enhanced Mechanical Properties And Thermal Shock Resistance Of Si2Bc3N Ceramics With Sic Coated Mwcnts, Ning Liao, Dechang Jia, Zhihua Yang, Yu Zhou

Journal of Advanced Ceramics

Bulk Si2BC3N ceramics were reinforced with SiC coated multi-walled carbon nanotubes (MWCNTs). The phase compositions, mechanical properties, and thermal shock resistance, as well as the oxidation resistance of the designed Si2BC3N ceramics were comparatively investigated. The results show that nano SiC coating can be formed on MWCNTs through pyrolyzing polysilazane, which improves the oxidation resistance of MWCNTs. A stronger chemical bonding is formed between the SiC coated MWCNTs and SiC particles, contributing to improved flexural strength (532.1 MPa) and fracture toughness (6.66 MPa·m1/2). Besides, the 2 vol ...


Microstructure And Mechanical Properties Of H-Bn/Yb4Si2O7N2 Composites, Juanjuan Chen, Jixin Chen, Hao Zhang, Minmin Hu, Meishuan Li Oct 2020

Microstructure And Mechanical Properties Of H-Bn/Yb4Si2O7N2 Composites, Juanjuan Chen, Jixin Chen, Hao Zhang, Minmin Hu, Meishuan Li

Journal of Advanced Ceramics

A series of h-BN based composites with Yb4Si2O7N2 as a secondary phase were successfully synthesized by an in situ reaction hot pressing method. It was found that the relative density and room-temperature mechanical properties monotonically increased with increasing the content of Yb4Si2O7N2 from 20 to 50 vol%. When 50 vol% Yb4Si2O7N2 was introduced, the relative density of the composite reached 98.75%, and its flexural strength, compressive strength, fracture toughness, and hardness reached 338±10 MPa, 803±49 MPa ...


Physical And Mechanical Properties Of Hot-Press Sintering Ternary Cm2A8 (Camg2Al16O27) And C2M2A14 (Ca2Mg2Al28O46) Ceramics, Bin Li, Guangqi Li, Haiyang Chen, Junhong Chen, Xinmei Hou, Yong Li Oct 2020

Physical And Mechanical Properties Of Hot-Press Sintering Ternary Cm2A8 (Camg2Al16O27) And C2M2A14 (Ca2Mg2Al28O46) Ceramics, Bin Li, Guangqi Li, Haiyang Chen, Junhong Chen, Xinmei Hou, Yong Li

Journal of Advanced Ceramics

The new ternary CM2A8 (CaMg2Al16O27) and C2M2A14 (Ca2Mg2Al28O46) pure and dense ceramics were first prepared by a hot-press sintering technique, and their physical and mechanical properties were investigated. The purity of obtained CM2A8 and C2M2A14 ceramics reaches 98.1 wt% and 97.5 wt%, respectively. Their microstructure is dense with few observable pores, and their grain size is about a few dozen microns. For their physical properties, the average apparent porosity of ...


Pressureless Sintering Of Zrc With Variable Stoichiometry, Katrin Schönfeld, Hans-Peter Martin, Alexander Michaelis Oct 2020

Pressureless Sintering Of Zrc With Variable Stoichiometry, Katrin Schönfeld, Hans-Peter Martin, Alexander Michaelis

Journal of Advanced Ceramics

This paper presents the experiments on the synthesis of zirconium carbide (ZrC) using carbothermal reduction of zirconia (ZrO2). The ratio of ZrO2:C is used to adapt ZrCxOy with x < 1 or ZrC + C. The modification of ZrCxOy and the total carbon amount allows the use of pressureless sintering method in combination with sintering temperatures ≤ 2000 ℃. Fully densified ZrC products are obtained. The relevant details of ZrC formation are investigated by X-ray diffraction (XRD). The sintered products are characterized by XRD, field emission scanning electron microscopy (FESEM), as well as mechanical and electrical methods. XRD and FESEM investigations show that ...


Mechanical Properties And Biocompatibility Of Polymer Infiltrated Sodium Aluminum Silicate Restorative Composites, Huining Wang, Bencang Cui, Jing Li, Shu Li, Yuanhua Lin, Deping Liu, Ming Li Oct 2020

Mechanical Properties And Biocompatibility Of Polymer Infiltrated Sodium Aluminum Silicate Restorative Composites, Huining Wang, Bencang Cui, Jing Li, Shu Li, Yuanhua Lin, Deping Liu, Ming Li

Journal of Advanced Ceramics

A new type of polymer-infiltrated-ceramic-network composites (PICNs) was fabricated by infiltrating methacrylate-based monomers into partially sintered porous ceramics. The mechanical properties (flexural strength, flexural modulus, elastic modulus, Vickers hardness, fracture toughness) were investigated and compared with that of the natural tooth and common commercial CAD/CAM blocks. Our results indicated that sintering temperature and corresponding density of porous ceramics have an obvious influence on the mechanical properties, and PICNs could highly mimic the natural tooth in mechanical properties. The biocompatibility experiments evaluated through in vitro cell attachment and proliferation of BMSCs showed good biocompatibility. The mechanical properties and biocompatibility confirmed ...


Phase Evolution And Properties Of Novel Al2O3-Based Poly-Hollow Microsphere (Phm) Ceramics, Jia-Min Wu, Ying Chen, Xiao-Yan Zhang, Qian Huang, Jin-Long Yang, Yu-Sheng Shi Oct 2020

Phase Evolution And Properties Of Novel Al2O3-Based Poly-Hollow Microsphere (Phm) Ceramics, Jia-Min Wu, Ying Chen, Xiao-Yan Zhang, Qian Huang, Jin-Long Yang, Yu-Sheng Shi

Journal of Advanced Ceramics

In this paper, novel Al2O3-based poly-hollow microsphere (PHM) ceramics were prepared using Si3N4 and Al2O3 PHMs as pore-forming agents. The effect of Si3N4 and Al2O3 PHMs with different percentages on properties of Al2O3-based PHM ceramics was investigated. Through adjusting percentage of Al2O3 PHMs, Al2O3-based PHM ceramics with enhanced properties are achieved. X-ray diffraction (XRD) results show that main phases of Al2O3-based PHM ceramics vary from β-SiAlON (z value increases ...


Sintering And Mechanical Properties Of Β-Sic Powder Obtained From Waste Tires, G. Magnani, S. Galvagno, G. Sico, S. Portofino, C. Freda, E. Burresi Oct 2020

Sintering And Mechanical Properties Of Β-Sic Powder Obtained From Waste Tires, G. Magnani, S. Galvagno, G. Sico, S. Portofino, C. Freda, E. Burresi

Journal of Advanced Ceramics

Plasma synthesized SiC powder obtained from quartz and carbonaceous residue of waste tires was successfully sintered at 1925 ℃ by pressureless liquid-phase method using yttria and alumina as sintering aids (T-SiC). Comparison with sintered SiC obtained from commercial powder (C-SiC) put in evidence of similar sintered density (98%T.D.), but much finer microstructure of T-SiC than that of C-SiC. T-SiC also showed higher flexural strength than C-SiC both at room temperature (508 vs. 458 MPa) and at 1500 ℃ (280 vs. 171 MPa). Difference in liquid phase was responsible for the differences in hardness and fracture toughness. The high value of ...


Characterisation Of Mechanical And Thermal Properties In Flax Fabric Reinforced Geopolymer Composites, Hasan Assaedi, Thamer Alomayri, Faiz U. A. Shaikh, It-Meng Low Oct 2020

Characterisation Of Mechanical And Thermal Properties In Flax Fabric Reinforced Geopolymer Composites, Hasan Assaedi, Thamer Alomayri, Faiz U. A. Shaikh, It-Meng Low

Journal of Advanced Ceramics

This paper presents the mechanical and thermal properties of flax fabric reinforced fly ash based geopolymer composites. Geopolymer composites reinforced with 2.4, 3.0 and 4.1 wt% woven flax fabric in various layers were fabricated using a hand lay-up technique and tested for mechanical properties such as flexural strength, flexural modulus, compressive strength, hardness, and fracture toughness. All mechanical properties were improved by increasing the flax fibre contents, and showed superior mechanical properties over a pure geopolymer matrix. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) studies were carried out to evaluate the composition and fracture ...


Preparation Of Porous Si3N4 Ceramics Via Tailoring Solid Loading Of Si3N4 Slurry And Si3N4 Poly-Hollow Microsphere Content, Jia-Min Wu, Xiao-Yan Zhang, Jie Xu, Ke Gan, Jia-Lu Li, Chen-Hui Li, Jin-Long Yang, Yu-Sheng Shi Oct 2020

Preparation Of Porous Si3N4 Ceramics Via Tailoring Solid Loading Of Si3N4 Slurry And Si3N4 Poly-Hollow Microsphere Content, Jia-Min Wu, Xiao-Yan Zhang, Jie Xu, Ke Gan, Jia-Lu Li, Chen-Hui Li, Jin-Long Yang, Yu-Sheng Shi

Journal of Advanced Ceramics

Porous Si3N4 ceramics were prepared by aqueous gelcasting using Si3N4 poly-hollow microspheres (PHMs) as pore-forming agent. The effects of solid loading of Si3N4 slurry and Si3N4 PHM content on the properties of porous Si3N4 ceramics were investigated. Only β-Si3N4 phase is observed in porous Si3N4 ceramics, and Si3N4 PHMs distribute uniformly both in Si3N4 green samples and porous Si3N4 ceramics. Results show that solid loading of Si3N4 ...


Preparation, Mechanical, And Thermal Properties Of A Promising Thermal Barrier Material: Y4Al2O9, Yanchun Zhou, Xinpo Lu, Huimin Xiang, Zhihai Feng Oct 2020

Preparation, Mechanical, And Thermal Properties Of A Promising Thermal Barrier Material: Y4Al2O9, Yanchun Zhou, Xinpo Lu, Huimin Xiang, Zhihai Feng

Journal of Advanced Ceramics

In our previous work, anisotropic chemical bonding, low shear deformation resistance, damage tolerance ability, low thermal conductivity, and moderate thermal expansion coefficient of Y4Al2O9 (YAM) were predicted. In this work, phase-pure YAM powders were synthesized by solid-state reaction between Y2O3 and Al2O3 and bulk YAM ceramics were prepared by hot-pressing method. Lattice parameters and a new set of X-ray powder diffraction data were obtained by Rietveld refinement. The mechanical and thermal properties of dense YAM ceramics were investigated. The measured elastic moduli are close to the theoretical predicted values ...


Microstructure And Mechanical Properties Of SicF/Sibcn Ceramic Matrix Composites, Jiaying Wang, Zhihua Yang, Xiaoming Duan, Dechang Jia, Yu Zhou Oct 2020

Microstructure And Mechanical Properties Of SicF/Sibcn Ceramic Matrix Composites, Jiaying Wang, Zhihua Yang, Xiaoming Duan, Dechang Jia, Yu Zhou

Journal of Advanced Ceramics

SiC fiber reinforced SiBCN ceramic matrix composites (CMCs) have been prepared by mechanical alloying and consolidated by hot pressing. During the sintering process, amorphous SiC fibers crystallized seriously and transformed into β-SiC. Meanwhile, the interfacial carbothermal reactions caused the strong bonding between the matrix and fibers. As a result, SiCf/SiBCN fractured in a typical catastrophic manner. Room-temperature mechanical properties reached the maximums for the CMC samples sintered at 1900 ℃/60 MPa/30 min. The density, flexural strength, Young’s modulus and fracture toughness are 2.56±0.02 g/cm3, 284.3±17.9 MPa, 183.5 ...


Evaluation Of Sic–Porcelain Ceramics As The Material For Monolithic Catalyst Supports, Oleg Smorygo, Alexander Marukovich, Vitali Mikutski, Vladislav Sadykov Oct 2020

Evaluation Of Sic–Porcelain Ceramics As The Material For Monolithic Catalyst Supports, Oleg Smorygo, Alexander Marukovich, Vitali Mikutski, Vladislav Sadykov

Journal of Advanced Ceramics

Mechanical and thermal properties of SiC–porcelain ceramics were studied in the wide SiC content range of 0–95%. Microstructure evolution, shrinkage at sintering, porosity, mechanical strength, elastic modulus, coefficient of thermal expansion (CTE) and thermal conductivity were studied depending on SiC content. The optimal sintering temperature was 1200 ℃, and the maximum mechanical strength corresponded to SiC content of 90%. Parametric evaluation of the ceramic thermal shock resistance revealed its great potential for thermal cycling applications. It was demonstrated that the open-cell foam catalyst supports can be manufactured from SiC–porcelain ceramics by the polyurethane foam replication process.


Mechanical Properties Of Cotton Fabric Reinforced Geopolymer Composites At 200–1000 ℃, Thamer Alomayri, Les Vickers, Faiz U. A. Shaikh, It-Meng Low Oct 2020

Mechanical Properties Of Cotton Fabric Reinforced Geopolymer Composites At 200–1000 ℃, Thamer Alomayri, Les Vickers, Faiz U. A. Shaikh, It-Meng Low

Journal of Advanced Ceramics

Geopolymer composites containing woven cotton fabric (0–8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 ℃, 400 ℃, 600 ℃, 800 ℃ and 1000 ℃. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 ℃, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.


Structural, Optical And Mechanical Properties Of Ternary Cao–Caf2–P2O5 Glasses, G. Venkateswara Rao, H. D. Shashikala Oct 2020

Structural, Optical And Mechanical Properties Of Ternary Cao–Caf2–P2O5 Glasses, G. Venkateswara Rao, H. D. Shashikala

Journal of Advanced Ceramics

The ternary phosphate glass series (50-x)CaO–xCaF2–50P2O5 (x = 0–20 mol%) were synthesized using melt quench technique. Structural, optical and mechanical properties were investigated with increase in CaF2 content. Using X-ray diffraction (XRD), synthesized glasses were confirmed to be amorphous in nature. Replacement of oxygen ions by fluorine ions increased the values of density. Decrease in refractive index due to the low polarizability of fluorine ions in the glass matrix was observed. In Fourier transform infrared (FTIR) spectra, the slight variation in νas (PO2) band position and intensity could be attributed to ...


Property Mapping Of Polycrystalline Diamond Coatings Over Large Area, Awadesh Kumar Mallik, Sandip Bysakh, Monjoy Sreemany, Sudakshina Roy, Jiten Ghosh, Soumyendu Roy, Joana Catarina Mendes, Jose Gracio, Someswar Datta Oct 2020

Property Mapping Of Polycrystalline Diamond Coatings Over Large Area, Awadesh Kumar Mallik, Sandip Bysakh, Monjoy Sreemany, Sudakshina Roy, Jiten Ghosh, Soumyendu Roy, Joana Catarina Mendes, Jose Gracio, Someswar Datta

Journal of Advanced Ceramics

Large-area polycrystalline diamond (PCD) coatings are important for fields such as thermal management, optical windows, tribological moving mechanical assemblies, harsh chemical environments, biological sensors, etc. Microwave plasma chemical vapor deposition (MPCVD) is a standard technique to grow high-quality PCD films over large area due to the absence of contact between the reactive species and the filament or the chamber wall. However, the existence of temperature gradients during growth may compromise the desired uniformity of the final diamond coatings. In the present work, a thick PCD coating was deposited on a 100-mm silicon substrate inside a 915-MHz reactor; the temperature gradient ...


Determination Of Fracture Toughness Using The Area Of Micro-Crack Tracks Left In Brittle Materials By Vickers Indentation Test, Alireza Moradkhani, Hamidreza Baharvandi, Mehdi Tajdari, Hamidreza Latifi, Jukka Martikainen Oct 2020

Determination Of Fracture Toughness Using The Area Of Micro-Crack Tracks Left In Brittle Materials By Vickers Indentation Test, Alireza Moradkhani, Hamidreza Baharvandi, Mehdi Tajdari, Hamidreza Latifi, Jukka Martikainen

Journal of Advanced Ceramics

In this article, a new method has been presented for the estimation of fracture toughness in brittle materials, which enjoys improved accuracy and reduced costs associated with fracture toughness testing procedure compared to similar previous methods, because a vast range of specimens with irregular cracks can be accommodated for testing. Micron-sized alumina powders containing 0.05 wt% magnesium oxide (MgO) nanoparticles were mixed and also together with 2.5 vol%, 5 vol%, 7.5 vol%, 10 vol%, and 15 vol% of silicon carbide (SiC) nanopowders separately. By making and testing various types of ceramics with different mechanical properties, and considering ...


Morphology And Electric Potential-Induced Mechanical Behavior Of Metallic Porous Nanostructures, Sunghan Kim, Andreas A. Polycarpou, Hong Liang Oct 2020

Morphology And Electric Potential-Induced Mechanical Behavior Of Metallic Porous Nanostructures, Sunghan Kim, Andreas A. Polycarpou, Hong Liang

Friction

Understanding mechanical behaviors influenced by electric potential and tribological contacts is important for verifying the robustness and reliability of applications based on metallic porous nanostructures in electrical stimulations. In this work, nickel-based metallic porous nanostructures were studied to characterize their mechanical properties and morphologically dependent contact areas during application of an electric potential using a nanoindenter. We observed that the indentation moduli of nickel-based metallic porous nanostructures were altered by pore size and application of electric potential. In addition, the structural aspects of the surface morphology of nickel-based porous nanostructures had a critical effect on the determination of contact area ...


Hydrophobic, Mechanical, And Tribological Properties Of Fluorine Incorporated Hydrogenated Fullerene-Like Carbon Films, Li Qiang, Bin Zhang, Kaixiong Gao, Zhenbin Gong, Junyan Zhang Oct 2020

Hydrophobic, Mechanical, And Tribological Properties Of Fluorine Incorporated Hydrogenated Fullerene-Like Carbon Films, Li Qiang, Bin Zhang, Kaixiong Gao, Zhenbin Gong, Junyan Zhang

Friction

Fluorine-incorporated hydrogenated fullerene-like nanostructure amorphous carbon films (F-FLC) were synthesized by employing the direct current plasma enhanced chemical vapor deposition (dc-PECVD) technique using a mixture of methane (CH4), tetra-fluoromethane (CF4), and hydrogen (H2) as the working gases. The effect of the fluorine content on the bonding structure, surface roughness, hydrophobic, mechanical, and tribological properties of the films was systematically investigated using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Raman analysis, atomic force microscope (AFM), contact angle goniometer, nano-indenter, and reciprocating ball-on-disc tester, respectively. The fluorine content in the films increased from 0 to 2.1 ...


Determination Of Steels In Kentucky Bridges, Theodore Hopwood Ii, Christopher Goff, Sudhir Palle Oct 2020

Determination Of Steels In Kentucky Bridges, Theodore Hopwood Ii, Christopher Goff, Sudhir Palle

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet (KYTC) maintains over two hundred steel bridges constructed with types of steel which are unknown. Kentucky Transportation Center (KTC) researchers have developed a procedure for determining steel tensile properties (0.2% yield strength and ultimate tensile strength) which can be used to help identify unknown steels. The procedure involves extracting small coupons from the lower flanges of steel deck girder bridges. Coupons are then machined into sub-sized tensile testing specimens and suitable shapes for chemical analyses. Sub-sized tensile tests returned values generally comparable to those provided in mill certifications of steels purchased for laboratory trials. Several ...


Upgradation Of Unsaturated Polyester Resin Using Nanoclays And The Effect Of Process Variables On Mechanical Properties Of Polyester/Clay Nanocomposites, Nevil Johnson, Deviprasad Varma P.R, Manoj George, K.E George Sep 2020

Upgradation Of Unsaturated Polyester Resin Using Nanoclays And The Effect Of Process Variables On Mechanical Properties Of Polyester/Clay Nanocomposites, Nevil Johnson, Deviprasad Varma P.R, Manoj George, K.E George

International Journal of Mechanical and Industrial Engineering

This paper addresses the effects of operating variables on mechanical properties of polyester/clay nanocomposites including tensile strength, percentage elongation etc. The variables were clay type, clay content, and prepolymer–clay mixing type. The experiments were carried out based on the design of experiments using statistical methods. The nanocomposites were synthesized via in situ polymerization of polyester and clay (dissolved using styrene monomer) with Methyl-ethyl ketone peroxide (MEKP) as catalyst in Cobalt base accelerator. Unmodified Kaolinite clay and Vinyl silane modified clay are the two types of clay examined. The parameters studied, clay type and mixing method are found to ...


Mechanical Behaviour Of Polypropylene And Human Hair Fibres And Polypropylene Reinforced Polymeric Composites, Sanjay Choudhry, Bhawana Pandey Sep 2020

Mechanical Behaviour Of Polypropylene And Human Hair Fibres And Polypropylene Reinforced Polymeric Composites, Sanjay Choudhry, Bhawana Pandey

International Journal of Mechanical and Industrial Engineering

Bio fibres have recently become eye-catching to researchers, engineers and scientist as an alternative reinforcement for FRP (fibre reinforced polymer) composite. Due to their low cost, fairly good mechanical properties, high aspect strength .Three to four ton of human hair fibre wasted in India annually .These fibre pose an environmental challenge In order to find commercial application the wasted human hair fibre mixed with polypropylene. Polypropylene based composite are prepared using hair fibre obtained from human hair. Human hair fibres are mixed into polypropylene (PP) at 3,5,10 and 15 % by wt. using two roll mills. The composite are ...


Mechanical And Optical Properies Of Poly Lactic Acid Modified Linear- Low Density Polyethylene / Low Density Polyethylene (Lldpe/Ldpe) Blend Blown Film, Omveer Singh, Pradeep Upadhyaya, Navin Chand, T.K Mishra Sep 2020

Mechanical And Optical Properies Of Poly Lactic Acid Modified Linear- Low Density Polyethylene / Low Density Polyethylene (Lldpe/Ldpe) Blend Blown Film, Omveer Singh, Pradeep Upadhyaya, Navin Chand, T.K Mishra

International Journal of Mechanical and Industrial Engineering

Poly lactic acid (PLA) is well known aliphatic poly-esters derived from corn and sugar beets, and degrades into nontoxic compounds in landfill. Melt blending of poly lactic acid and linear low density polyethylene (LLDPE) was performed in an effort to toughen polylactic acid. Melt blending of linear low density polyethylene (LLDPE) and polylactic Acid (PLA) and Low density poly ethylene (LDPE) were performed in a twin screw extruder with post extrusion blown film. The blend compositions were optimized by mechanical properties. On the basis of this, LLDPE 80 wt % LDPE 20 wt% and 1-4 wt% poly lactic acid (PLA) were ...


Mechanical And Micro-Structural Study Of Friction Stir Welding Of Al-Alloy, Biswajit Parida Aug 2020

Mechanical And Micro-Structural Study Of Friction Stir Welding Of Al-Alloy, Biswajit Parida

International Journal of Applied Research in Mechanical Engineering

The present study is on the development of friction stir welding (FSW) of commercial grade Al-alloy to study the mechanical and microstructural properties. The proposed research will include experiments related to the effect of FSW optimum process parameter on weldability of Al alloy. The present paper has been subdivided in to two different sections: 1. Study of Mechanical properties and 2. Study of micro-structural properties. Section1 describes the tensile strength of welded sample and distribution of microhardness in different zones of FSW weld specimen and section2 contains the microstructure characterization of different zones of friction stir welds.


Effects Of Zirconia Doping On Additively Manufactured Alumina Ceramics By Laser Direct Deposition, John M. Pappas, Aditya R. Thakur, Xiangyang Dong Jul 2020

Effects Of Zirconia Doping On Additively Manufactured Alumina Ceramics By Laser Direct Deposition, John M. Pappas, Aditya R. Thakur, Xiangyang Dong

Mechanical and Aerospace Engineering Faculty Research & Creative Works

The ability to additively manufacture functional alumina ceramics has the potential to lower manufacturing costs and development time for complex components. In this study, the doping effects of zirconia on laser direct deposited alumina ceramics were investigated. The microstructure of the printed samples was analyzed in terms of grain size and composition distribution. The addition of zirconia was found to accumulate along alumina grain boundaries and resulted in significant grain refinement. The zirconia doping largely reduced crack formation during processing compared to that of pure alumina samples. In the case of 10 wt% zirconia, cracking during deposition was nearly completely ...


Materials-Processing Relationships For Metal Fused Filament Fabrication Of Ti-6al-4v Alloy., Paramjot Singh May 2020

Materials-Processing Relationships For Metal Fused Filament Fabrication Of Ti-6al-4v Alloy., Paramjot Singh

Electronic Theses and Dissertations

Additive manufacturing (AM) is at the mainstream to cater the needs for rapid tooling and small-scale part production. The metal AM of complex geometries is widely accepted and promoted in the industry. While several metal AM technologies exist and are matured to a level where expectation in terms of design and properties are possible to realize. But the metal AM suffers from the heavy expense to acquire equipment, isotropic property challenges, and potential hazards to work with loose reactive metal powder. With this motivation, the dissertation aims to develop the fundamental aspects to print metal parts with bound Ti-6Al-4V powder ...


Editorial: Structure And Mechanical Properties Of Titanium Alloys And Titanium Matrix Composites (Tmcs), Lechun Xie, Liqiang Wang, Lai-Chang Zhang, Weijie Lu Apr 2020

Editorial: Structure And Mechanical Properties Of Titanium Alloys And Titanium Matrix Composites (Tmcs), Lechun Xie, Liqiang Wang, Lai-Chang Zhang, Weijie Lu

ECU Publications Post 2013

No abstract provided.


Influence Of Cr Content On The Microstructure And Mechanical Properties Of Crxfenicu High Entropy Alloys, Hao Wu, Sirui Huang, Chengyan Zhu, Heguo Zhu, Zonghan Xie Apr 2020

Influence Of Cr Content On The Microstructure And Mechanical Properties Of Crxfenicu High Entropy Alloys, Hao Wu, Sirui Huang, Chengyan Zhu, Heguo Zhu, Zonghan Xie

ECU Publications Post 2013

© 2020 Chinese Materials Research Society The effect of Cr content on the microstructure and mechanical properties of CrxFeNiCu high entropy alloys (HEAs) was firstly studied by first-principles calculations. The calculated results show that the hardness of the alloys increased with the expense of its plasticity decrease, if the content of Cr in the alloy increased. In order to verify the calculated results, CrxFeNiCu (x = 0.8, 1, 1.5 and 2) high entropy alloys were synthesized by vacuum induction melting in the present study. The results show that as the value of x increased from 0.8 to 2, the ...