Results 91 to 100 of about 399,302 (324)

Hardness of porous nanocrystalline Co-Ni electrodeposits [PDF]

, 2013
The Hall-Petch relationship can fail when the grain size is below a critical value of tens of nanometres. This occurs particularly for coatings having porous surfaces.
A Ibañez, A Kelly, A W Burton, B R Jennings, C J Bray, C. Ma, D H Jeong, F. C. Walsh, G C Hadjipanayis, H Conrad, H S Kim, J Schiøtz, J. Zekonyte, L Wang, L Wang, M A Meyers, M Schlesinger, P G Sanders, Q Luo, Q. Luo, R Mishra, R. J. K. Wood, S C Wang, S. C. Wang, U Erb   +24 more
core   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Analysis of indentation size effect in copper and its alloys [PDF]

, 2013
For describing the indentation size effect (ISE), numerous models, which relate the load or hardness to the indent dimensions, have been proposed. Unfortunately, it is still difficult to associate the different parameters involved in such relationships ...
CHICOT, Didier, DECOOPMAN, Xavier, IOST, Alain, LOUIS, G., PUCHI-CABRERA, Eli-Saul, ROUDET, F., STAIA, M.H   +6 more
core   +7 more sources

Stepwise Optimization of Thermoelectric Performance in Cu3SbSe4‐Based Compounds via Alloying and Hierarchical Structuring

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Under the stepwise optimization strategy, (Sn, Te) co‐alloying functions as the primary initiative to enhance the power factor (PF), while the subsequent incorporation of AgCuTe operates as a synergistic maneuver to suppress lattice thermal conductivity (κlat), thereby concomitantly boosting the dimensionless figure of merit (ZT).
Wenying Wang, Xinglong Wang, Lin Bo, Wenying Zhou, Changcun Li, Zheng Zhang, Futian Liu, Degang Zhao   +7 more
wiley   +1 more source

Mechanical Assessment of CAD/CAM Fabricated Hybrid Ceramics: An In Vitro Study

Applied Sciences
The current study aimed to compare the mechanical properties of CAD/CAM fabricated hybrid ceramic restorative materials. The current study assessed the mechanical properties of additively and subtractively manufactured CAD/CAM fabricated hybrid ceramic ...
Khalid K. Alanazi, Abdulaziz A. Alzaid, Ali A. Elkaffas, Sarah A. Bukhari, Ramzi O. Althubaitiy, Khalid A. Alfaifi, Ibrahim M. Alfahdi, Hussain A. Alqahtani   +7 more
doaj   +1 more source

Advancing Severe Plastic Deformation for Tubular Samples: Systematic Review and Machine Learning Optimization

MetalMat, EarlyView.
This review highlights recent advancements in Severe Plastic Deformation (SPD) techniques tailored for tubular samples. The mechanisms of processing are critically discussed with emphasis on microstructural control and the governing process parameters that enable refinement to ultrafine‐ and nano‐grained structures. Comparative insights into equivalent
Eman M. Zayed, Abdulrahman I. Alateyah, Waleed H. El‐Garaihy, Mahmoud Shaban, Majed Alinizzi, Nahed A. El‐Mahallawy   +5 more
wiley   +1 more source

SEMI–AUTOMATED ASSESSMENT OF MICROMECHANICAL PROPERTIES OF THE METAL FOAMS ON THE CELL-WALL LEVEL

Acta Polytechnica CTU Proceedings, 2016
Metal foams are innovative porous material used for wide range of application such as deformation energy or sound absorption, filter material, or microbiological incubation carrier.
Nela Krčmářová, Jan Šleichrt, Tomáš Doktor, Daniel Kytýř, Ondřej Jiroušek   +4 more
doaj   +1 more source

First-principles Study of Vickers Hardness and Thermodynamic Properties of Ti 3 SnC 2 Polymorphs [PDF]

, 2015
We have investigated Vickers hardness and the thermodynamic properties of the recently discovered nanolaminate carbide Ti 3 SnC 2 polymorphs using the first-principles calculations. The chemical bonding shows a combination of covalent, ionic and metallic
M. A. Rayhan, Md. Ashraf Ali, S. Naqib, A. Islam   +3 more
semanticscholar   +1 more source

Water‐Borne Erosion of Reinforced Polymer Composites: Application to Shallow Offshore Marine Environment

Polymer Composites, EarlyView.
Comparison of experimental and model‐predicted erosion rates for carbon fibre‐reinforced polymer (CFRP) and glass fibre‐reinforced polymer (GFRP) under low‐velocity (2 m/s) and at varying angles and sand concentrations (0.0, 0.05, 0.4 g/L). The results demonstrate good agreement between experimental data and model predictions across different erosive ...
Ali Al‐Darraji, Christopher Lagat, Thaneshan Sapanathan, Peter Butt, Ibukun Oluwoye   +4 more
wiley   +1 more source

Effects of environment on microhardness of magnesium oxide [PDF]

Micro-Vickers hardness measurements of magnesium oxide single crystals were conducted in various environments. These environments included air, nitrogen gas, water, mineral oil with or without various additives, and aqueous solutions with various pH ...
Buckley, D. H., Ishigaki, H.
core   +1 more source