Engineering Commons^™

Electrodeposition Study Of Alloys For Solar Energy, Corrosion Resistance, And Battery Applications, Thaier Tawfeek Alawadh

Theses

Copper-Zinc-Tin sulphide (CZTS) compound is one of the alloys, which has significantly caught the attention of a considerable number of researchers since the beginning of the century. Consequently, academic laboratories started investigating the alloy in-depth with its various combination due to its valuable applications with high potential usage. The CZTS alloy has a high tendency to replace the current copper indium gallium selenide (CIGS) thin-film solar cell system due to scarcity of CIGS components, and toxic manufacturing procedures compared to CZTS. Nevertheless, CZTS is a new studied compound with exceptionally low photovoltaic empirical efficiency and an inadequate understanding of its …

Phase Separation And Enhanced Wear Resistance Of Cu88fe12 Immiscible Coating Prepared By Laser Cladding, Shuzhen Zhao, Shengfeng Zhou, Min Xie, Xiaoqin Dai, Dongchu Chen, Laichang Zhang

Research outputs 2014 to 2021

In order to eliminate the microstructure segregation of Cu–Fe immiscible alloys which characterized with a liquid miscible gap, the Cu88Fe12 (wt.%) immiscible coating was prepared by laser cladding. The phase separation characteristic and wear resistance of the Cu88Fe12 (wt.%) immiscible coating were also investigated. The results show that the size of the milled Cu88Fe12 composite powder is reduced comparing to that of the un-milled powder due to fracturing during mechanical milling. Moreover, the demixing or delamination disappears in the Cu88Fe12 immiscible coating and a large amount of face-centered-cubic (fcc) γ-Fe and body-centered-cubic (bcc) α-Fe particles are dispersed in the face-centered-cubic …

Effect Of Preliminary Heat Treatment On Change In Microstructure Of Brass Cuzn36 During Pressing In Equal Channel Step Matrix, Irina Volokitina, Georgy Kurapov

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.

Size Dependent Deformation Of Beta Brass, Oscar Torrents, Bentejui Medina Clavijo, Carl Frick, Andreas Schneider, Eduard Arzt

Nanomechanical Testing in Materials Research and Development V

Previous research has shown that size scale dictates materials strength, reaching into the GPa range for specimens in the (sub-) micron regime. However, the influence of crystal structure on this ‘size-effect’ is poorly understood. In the present work, the deformation behavior of beta brass, which has a CsCl (B2) crystal structure and a low thermal component to the room temperature strength, has been studied through the compression of focused ion beam manufactured pillars at room temperature. The size dependence of beta brass is found to be close to that observed in FCC metals although the deformation processes differ significantly. While …

Characterization Of Physical And Structural Properties Of Brass Powder After Biofield Treatment, Mahendra Kumar Trivedi, Gopal Nayak, Rama Mohan Tallapragada, Omprakash Latiyal, Snehasis Jana

Mahendra Kumar Trivedi

The Effects Of Asymmetric Micro Ratchets On Pool Boiling Performance, Lance Austin Brumfield

LSU Doctoral Dissertations

Nucleate boiling is an attractive method for achieving high heat flux at low superheat temperatures. It is frequently used for industrial applications such as heat exchangers and is being considered to cool advanced central processing units (CPU) which produce heat fluxes on the order of 1 MW/m2 and are becoming increasingly less efficient to cool via forced conduction of air. The issue with implementing nucleate boiling as a cooling mechanism lies in the difficulty of quantifying the numerous and complex mechanisms which control the process. A comprehensive nucleate boiling model has yet to be formulated and will be required in …

Corrosion Behaviour Of Brass In The Vembanad Estuary, India, Andy Mathiazhagan, Rani Joseph, Kanjiramparayil Puthilon Narayanan, Palaniandy Seralathan

Journal of Marine Science and Technology

Corrosion characteristics of brass panels were investigated in the Vembanad estuarine water (Cochin Harbor), India over a period of one year. The corrosion rate of brass samples during exposure was determined by gravimetric method and fouling on panels was assessed, exposure-wise, in terms of biomass. Corrosion products were identified by X-Ray diffraction. The results of the study were discussed in the light of the seawater characteristics.

Complex Of 3-Amino-1,2,4-Triazole And Na_2wo_4 As An Inhibitor For Brass Corrosion, Qun-Jie Xu, Chun-Xiang Li, Yu-Hong Ni, Guo-Ding Zhou

Journal of Electrochemistry

AC impedance and polarization methods were used to study the inhibition effect of ATA and the complex of ATA and Na2WO4 for brass corrosion in 3% NaCl solution.The results indicated that ATA had inhibition effect for brass corrosion.ATA showed the best inhibition effect for brass corrosion at the ATA concentration of 7.5 mg·L-1,and the inhibition efficiency was 87.46%.At the ATA concentration of 7.5 mg·L-1 and at the Na2WO4 concentration of 0.15 mg·L-1,the complex showed optimum inhibition effect for brass corrosion,and also showed synergistic effect and the inhibition efficiency reached 91.82%.The complex of ATA and Na2WO4 was cathodic corrosion inhibitor.

Physical And Chemical Characteristics Of Commercially Available Brake Shoe Lining Materials: A Comparative Study

A.S. Md Abdul Haseeb

The physical and chemical characteristics of four commercial automotive brake shoe lining materials used in heavy vehicles have been investigated and compared. Relevant physical properties viz. density, water absorption and swelling characteristics were determined using standard test methods. X-ray diffraction, infrared spectroscopy and optical microscopic techniques were used to identify the constituents. It has been observed that all of the four friction materials contain phenol formaldehyde resin as the matrix. Other major ingredients were also the same in all the samples but their amount and size varied. These include asbestos as fibre reinforcement, barium sulphate as filler and brass particles …

Physical And Chemical Characteristics Of Commercially Available Brake Shoe Lining Materials: A Comparative Study

A.S. Md Abdul Haseeb

The physical and chemical characteristics of four commercial automotive brake shoe lining materials used in heavy vehicles have been investigated and compared. Relevant physical properties viz. density, water absorption and swelling characteristics were determined using standard test methods. X-ray diffraction, infrared spectroscopy and optical microscopic techniques were used to identify the constituents. It has been observed that all of the four friction materials contain phenol formaldehyde resin as the matrix. Other major ingredients were also the same in all the samples but their amount and size varied. These include asbestos as fibre reinforcement, barium sulphate as filler and brass particles …

Stress-Corrosion Cracking Of Brass, Paul A. Fossey

Bachelors Theses and Reports, 1928 - 1970

the mechanism of stress-corrosion cracking of brass has been sought for many years. Investigators have proposed many mechanisms, but each of these mechanisms has always had several drawbacks. This paper presents an account of experimental work done in the laboratory on this subject and compares it to the work of previous investigations. It evaluates the mechanisms presented by investigators and shows the failures of these mechanisms. A theory of Nitrogen Embrittlement is presented and an evaluation of this theory with experimental work follows.

The Theory Of Alloy Deposition And The Effect Of A Rotating Cathode Upon Such Deposition, With Special Attention To The Possibility Of Depositing Sterling Silver, Kenneth J. Stodden

Bachelors Theses and Reports, 1928 - 1970

In the past few years a great deal of atten­tion has been given to the electrodeposition of alloys. For the main part, this investigation has been of scien­tific interest only; but in a few instances, such work has attained commercial importance.

Electrolytic Recovery Of Copper And Zinc From Brass., V. Kent Loughran

Bachelors Theses and Reports, 1928 - 1970

The reclamation of metals from scrap is becoming increasingly important in the metallurgical industry. Copper, because it does not corrode readily and is electronegative to most common metals, is peculiarly adapted to reclamation.

Electrolytic Recovery Of Copper And Zinc From Brass, D. H. Swank

Bachelors Theses and Reports, 1928 - 1970

The purpose of this research was to continue the work of Thomas Parker, who worked on the recovery of copper and zinc from brass during the school year l934 - 1935. Since there is such a wide variety of brasses made with usually a third alloying constituent, remelt­ed scrap is suitable only for castings of wide tolerance in specifications.

Electrolytic Recovery Of Copper And Zinc From Brasses, Thomas Barker Jr.

Bachelors Theses and Reports, 1928 - 1970

Reclaimed metals, or secondary metals, are becoming of great im­portance in the metal industries of the world. Secondary metals are an important factor in production. The increase in the secondary production of copper is due to many factors. One of these may be its permenance, that is, the metal does not corrode very readily. Another reason for increase in production is the high price paid for it.

Effect Of Impurities Upon Current Efficiency In The Electrolysis Of Zinc Sulphate Solution, Robert Jess Smith

Bachelors Theses and Reports, 1928 - 1970

There are many elements which are detrimental to the current efficiency in the electrolysis of zinc sulphate solution. Fortunately the majority of these elements are easily removed in the purification process and cause no further trouble. The elements that are likely to cause trouble in ordinary plant operations are antimony, arsenic, cobalt, nickel, manganese and germanium. The following tests were made to determine the mutual effect on the current efficiency when several of the impurities were present in the electrolyte.