Engineering Commons^™

A Comparison Of Nanotribology And Nanoindentation, Steffen Brinckmann, Caroline Fink, Gerhard Dehm

Nanomechanical Testing in Materials Research and Development V

Metal friction and wear is the collective contact and interaction of asperities of micrometer dimension. We use a nanoindenter with tangential force measurement to simulate the behavior in engineering contacts and to fundamentally understand friction and wear.

This presentation investigates the deformation due to a single stroke scratch of a diamond nanoindenter in austenite base. We find that the elastic and plastic equations for static indentation also apply for the dynamic scratching. Additionally, the friction coefficient is found to be normal force dependent and we observe three domains: microstructure dominated friction, plastic plowing dominated wear and wear particle dominated tribology. …

Obtaining Mechanical Properties Of Superelastic Materials From Microindentation Data, Dmitry Zhuk, Margarita Isaenkova, Olga Krymskaya, Yuriy Perlovich

Nanomechanical Testing in Materials Research and Development V

Indentation is one of the most widely used techniques for determination of mechanical properties of materials. Many various methods for extraction of mechanical properties had been introduced for elasto-plastic materials. Later, the use of microindentation were extended to composite, porous, anisotropic and multi-phase materials. Use of microindentation for determination of such materials properties is impeded due to its complex behavior and larger number of material properties’ constants.

This work is focused on indentation of superelastic materials with austenite - martensite phase transformation and extraction of material properties. Finite element (FE) modeling was used to model indentation of superelastic alloys with …

High Temperature Nanoindentation Testing Of Amorphous Silicon Carbonitride Thin Films, Radim Ctvrtlik, Marwan Al-Haik, Valeriy Kilikovsky

Nanomechanical Testing in Materials Research and Development V

The mechanical properties of amorphous silicon carbonitride (SiC_xN_y) films with various nitrogen content (y = 0-40 at.%) were investigated in-situ at elevated temperatures up to 650 °C in inert atmosphere. The hardness and elastic modulus were evaluated using depth sensing nanoindentation with cubic boron nitride Berkovich indenter. Both the sample and indenter were separately heated during the experiments to temperatures 300, 500 and 650 °C. Short duration high temperature creep (1200 s) of the films was also investigated. The results revealed that the room temperature hardness and elastic modulus decline with the increase of the nitrogen …

The Measurement Of The Adhesion Force Between Ceramic Particles And Metal Matrix In Ceramic Reinforced-Metal Matrix Composites, Dariusz Jarzabek, Marcin Chmielewski, Tomasz Wojciechowski

Nanomechanical Testing in Materials Research and Development V

This paper presents the method for measurement of the adhesion force and fracture strength of the interface between ceramic particles and metal matrix in ceramic reinforced-metal matrix composites. Three samples with the following Cu to Al₂O₃ ratio (in vol.%) were prepared: 98.0Cu/2.0Al₂O₃, 95.0Cu/5.0Al₂O₃ and 90Cu/10Al₂O₃. Furthermore, microwires which contain a few ceramic particles were produced by means of electro etching. The microwires with clearly exposed interface were tested with use of the microtensile tester (Fig. 1). The microtensile tester consists of two stages, to which two …

Conference Program And Abstracts, Nicolas Abatzoglou, Sascha Kersten, Dietrich Meier

Biorefinery I: Chemicals and Materials From Thermo-Chemical Biomass Conversion and Related Processes

No abstract provided.

A Framework For An Economic Model Of Novel Process For The Fractionation Of Dried Distillers Grain With Solubles, R. Zakrzewski, K. Gounaropoulos, R. Allmendinger, M. Villegas Torres, C. Ibenegbu, R. Roque, S. Farid, J. Ward, G. Lye

Biorefinery I: Chemicals and Materials From Thermo-Chemical Biomass Conversion and Related Processes

No abstract provided.

Towards Continuous Aqueous Two-Phase Extraction (Catpe), Bettina Bommarius, Andres Bommarius, Irene Kaplanow, Julianne Merz, Gerhard Schembecker

Integrated Continuous Biomanufacturing II

Aqueous Two-Phase Extraction (ATPE) in mixer-settlers offers a gentle and biocompatible environment to separate proteins from complex mixtures. We have developed an aqueous two-phase system with inexpensive and biocompatible PEG 1500 or 4000 and ammonium citrate. We have purified several dehydrogenases [1] to near homogeneity after forward extraction into a PEG-heavy top phase at pH > 9 and back extraction into a bottom phase at pH 4-6; in selected cases, we were able to obtain pure protein in the bottom phase without forward extraction into the top phase. We have scaled up the PEG 1500/4000-ammonium citrate to a 5-10 L scale, …

Implementation Of Raman Spectroscopy At Manufacturing Scale: Overcoming Modeling Challenges While Implementing Advanced Process Control, John Smelko, Thomas Matthews, Brandon Berry, Douglas Osborne

Cell Culture Engineering XV

In order to improve glycation control in our new high intensity platform process, we investigated implementation of Raman spectroscopy to monitor and control glucose at low levels throughout the process. Using Raman allows a way to measure glucose near real time which in turn allows for a more responsive and flexible control algorithm. Prior literature has shown connections between elevated glucose levels and glycation when in presence of high protein concentrations, which was indicative of our process. Using Raman along with advanced process control (APC), allowed us the flexibility to reduce glycation back towards historical process levels.

We will share …

Three-Dimensional Printing Of Graphene-Based Composite Aerogels, Chen Zhu

Composites at Lake Louise (CALL 2015)

Graphene-based composite materials have found wide applications in nanoelectronics, sensors, catalysis, energy storage, and biomedicine areas for their unique combination of low density, exceptional mechanical properties, large surface area, and excellent electrical conductivity. Recent progress has produced bulk 3D assemblies of graphene, such as graphene aerogels, by the self-assembly or gelation of the graphene oxide (GO) suspension via hydrothermal reduction, chemical reduction, or direct crosslinking of the GO sheets. Other templating methods like chemical vapor deposition (CVD) coatings and freeze-casting have already been employed to control over the pore morphology of 3D graphene monoliths. However, the architecture of these graphene …

Joining Of Uhtc Boride Composites Using Metallic Interlayer, Noritaka Saito, Kei Nishimura, Kunihiko Nakashima, Cesare Melandri, Laura Esposito

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Effect Of Ni-Nb Interlayer Thickness On Mechanical Property Of Hfb2 Composite Joints, Kou Honda, Noritaka Saito, Kunihiko Nakashima, Cesare Melandri, Laura Esposito

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

An Oxidation Kinetic Analysis Of Hot Pressed Zirconium Carbide At High Temperature, Claudia Gasparrini, W.E. Lee, Richard Chater

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Uhtc Composites: Processing, Performance And Future, Jon Binner

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Characterization Of Ultra High Temperature Ceramic Coatings Deposited By Vacuum Plasma Spraying, Diletta Sciti, Yeon Woo Yoo, Sea Hoon Lee

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Ultra-High Temperature Mechanical Properties Of Zirconium Diboride-Based Ceramics, W.G. Fahrenholtz, G.E: Hilmas

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Sustained Hypersonic Flight – It’S Harder Than Rocket Science, Michael Smart

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Processing And Characterisation Of (Ta,Hf)C Ultra-High Temperature Ceramics., O. Cedillos, S. Grasso, D. Manara, D.D Jayaseelan, R. Konings, W.E. Lee

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Synthesis And Static Oxidation Testing Of Doped Hfb2 Powders, Pengxiang Zheng, Jon Binner, Bala Vaidhyanathan

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Preface, George Franks, Carolina Tallon

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Ultra-High Temperature Ceramics: Materials For Extreme Environment Applications Iii - Conference Program, George Franks, Carolina Tallon

Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications III

No abstract provided.

Suitability Of Geoscan-M Elemental Analyser For Phosphate Rock, H. Kurth, Derek Griffiths

Beneficiation of Phosphates VII

No abstract provided.

Smart, Sustainable Development Of Phosphate Resources: The Prospects For Phosphogypsum Utilization And Uranium Recovery, Julian Hilton

Beneficiation of Phosphates VII

No abstract provided.

New Development In Dihydrate -Hemihydrate Processes: The New Prayon Da-Hf Process, Tibaut Theys

Beneficiation of Phosphates VII

No abstract provided.

An Alternative Flotation Process For Apatite Concentration Of The Itataia Carbonaceous Uranium-Phosphate Ore, Elves Matiolo, Ligia Gonzaga, Ana Luiza Guedes

Beneficiation of Phosphates VII

No abstract provided.

Column Flotation Of Phosphate Ore, Ewan Wingate, Michael Kelahan

Beneficiation of Phosphates VII

No abstract provided.

Who Did What In Solvent Extraction A Demonstrated & Proven Technology For Uranium Recovery From Phosphoric Acid, Vaughn A, Regis Stana

Beneficiation of Phosphates VII

No abstract provided.

Improving Dolomite Collector Forflorida High-Mg Pebble, Chunhui Feng, Wenyi Song

Beneficiation of Phosphates VII

No abstract provided.

Phosphate In Australia, Ewan Wingate, John Dunster

Beneficiation of Phosphates VII

No abstract provided.

Application Of Classification And Fluidized Bed Flotation At Pcs Aurora, George Piegols, David Deplato, Jaisen Kohmuench, Eric Yan

Beneficiation of Phosphates VII

No abstract provided.

Rare Earths And The Recovery Of Administratium From Phosphates, Vaughn Astley

Beneficiation of Phosphates VII

No abstract provided.