Results 81 to 90 of about 62,678 (311)

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

Advanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu, Xun Zhang, Jack M. Donoghue, Albert D. Smith, Rahul Unnikrishnan, Rhys Thomas, Vahid Nekouie, Jie Luo, Dongchen Hu, Michael Preuss, Philip J. Withers   +10 more
wiley   +1 more source

Oxide Thermoelectric Energy Harvesting Materials [PDF]

, 2014
Conventional thermoelectric materials found in many thermoelectric devices have unfavourable properties; they often suffer instability at high temperatures and contain toxic metals which pose a hazard to the environment.
James, Ashley
core  

Change in thermal resistance of snow cover by land reclamation in cryolithozone

Аграрная наука Евро-Северо-Востока
A brief review of research on variation of thermal resistance of snow cover and formulas to determine the thermal conductivity coefficient of snow are presented.
A. F. Galkin, M. N. Zheleznyak, A. F. Zhirkov   +2 more
doaj   +1 more source

Prediction of Heat Transfer Characteristics of the Carbonized Layer of Resin-Based Ablative Material Based on the Finite Element Method

International Journal of Aerospace Engineering, 2019
The microstructure of the carbonized layer of the low-density resin-based ablative thermal insulation material is observed, and multiscale unit cell models are established for the residual carbon deposition mode of a carbonization process, and then the ...
Junjie Gao, Jijun Yu, Haitao Han, Daiying Deng   +3 more
doaj   +1 more source

Performance Analysis of Abradable Coating Systems for Aircraft Gas Turbines

Advanced Engineering Materials, EarlyView.
Three CoNiCrAlY/YSZ/MgAl2O4 abradable liner configurations on a nickel‐superalloy are evaluated by thermal‐gradient cycling and incursion tests. Laser ablation of the bondcoat and/or Y2O3‐stabilized ZrO2 (YSZ) intermediate layer increases mechanical interlocking and bonding for thick topcoats.
Hanna Heyl, Daniel Emil Mack, Martin Tandler, Susanne Schrüfer, Robert Vaßen   +4 more
wiley   +1 more source

Solid‐State Diffusion and Intermetallic Phase Formation in Roll‐Bonded Mg–Zn Composites With Kirigami‐Patterned Inlay

Advanced Engineering Materials, EarlyView.
Mg–Zn composites with a thickness of 0.21 mm were fabricated using roll bonding of a kirigami‐patterned Mg alloy inlay within a Zn matrix. Thermal activation following this process led to the formation of tailored intermetallic structures, which provided the composite with enhanced flexural strength.
Yaroslav Frolov, Oleksandr Bobukh, Christian Klose, Florian Nürnberger, Hans Jürgen Maier   +4 more
wiley   +1 more source

Investigation of relationships between ultrasonic pulse velocity and thermal conductivity coefficient in foam concretes [PDF]

, 2016
In this study, using type CEM I 42.5 R Portland cement, limestone powder, polypropylene fibers and super plasticizer, additive foam concrete specimens were produced.
Davraz, M., Koru, M., Kilinçarslan, Ş., Tuzlak, F.   +3 more
core   +1 more source

Application of the non-stationary method of thermal diffusivity measurement for the evaluation of the thermal conductivity coefficient of geopolymer mortars [PDF]

Archives of Civil Engineering
This article presents a study on the thermal properties of geopolymer mortars, which are novel materials with lower environmental impact and higher performance than Portland cement.
Maja Kępniak, Karol Prałat, Piotr Prochoń, Łukasz Majewski, Luc Courard, Justyna Ciemnicka   +5 more
doaj   +1 more source

Effects of Ultrasonic Vibration on the Transport Coefficients in Plasma Arc Welding

Metals, 2020
In ultrasound assisted plasma arc welding (U-PAW), the exerted ultrasonic vibration on the tungsten electrode interacts with the plasma arc and changes its heat-pressure characteristics.
Yongfeng Li, Chuansong Wu, Maoai Chen
doaj   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source