Design and thermo-structural analysis of multiple composite layers with ablative materials for passive thermal protection systems. [PDF]
Sci RepPark J +5 more
europepmc +1 more source
Effect of Grinding and Polishing Protocols on Surface Roughness, Flexural Strength, and Phase Transformation of High-Translucent 5 mol% Yttria-Partially Stabilized Zirconia. [PDF]
Eur J DentPhatphutthitham C +8 more
europepmc +1 more source
Effect of powder particle concentration, pulse duration, and pulse current on machined surface characterization produced via EDM of biocompatible WE-43Mg alloy. [PDF]
Sci RepKhan SA +4 more
europepmc +1 more source
Optimized Hot Pressing of High-Speed Steel-Bronze Composites for Diamond-Reinforced Tool Applications. [PDF]
Materials (Basel)Průša F +13 more
europepmc +1 more source
Hafnium Carbide Formation in Oxygen Deficient Hafnium Oxide Thin Films [PDF]
Applied Physics Letters, 2016 On highly oxygen deficient thin films of hafnium oxide (hafnia, HfO2−x) contaminated with adsorbates of carbon oxides, the formation of hafnium carbide (HfCx) at the surface during vacuum annealing at temperatures as low as 600 °C is reported. Using X-ray photoelectron spectroscopy the evolution of the HfCx surface layer related to a transformation ...
Christian Rodenbücher +2 more
exaly +5 more sources
Synthesis and Characterization of Hafnium Carbide Fine Powders
Ceramics International, 2013 Abstract Hafnium carbide powder was synthesized by sol–gel polycondensation of hafnium chloride with citric acid. The starting materials were dissolved in water and mixed homogeneously on a hot plate until precursor gel was formed. Pyrolysis of this gel resulted in monoclinic hafnia which after subsequent heat treatment transformed into hafnium carbide.
Maria Čebela +2 more
exaly +4 more sources
Carbides and Nitrides of Zirconium and Hafnium [PDF]
Materials, 2019 Among transition metal carbides and nitrides, zirconium, and hafnium compounds are the most stable and have the highest melting temperatures. Here we review published data on phases and phase equilibria in Hf-Zr-C-N-O system, from experiment and ab initio computations with focus on rocksalt Zr and Hf carbides and nitrides, their solid solutions and ...
Alexandra Navrotsky +2 more
exaly +5 more sources
Related searches:
Oxidation of hafnium carbide and hafnium carbide with additions of tantalum and praseodymium
Oxidation of Metals, 1991The oxidation behavior of HfC, HfC-25 wt. % TaC, and HfC-7 wt.% PrC2 has been studied between 1200–2200° C. Parabolic growth of the oxide layer has been observed for both HfC and HfC-TaC over the entire temperature range. A break in the temperature dependence of the oxidation kinetics occurs around 1600°C.
E. L. Courtright +4 more
openaire +1 more source
Oxygen Reduction on Hafnium/Hafnium Carbide Nanoparticles
ECS Meeting Abstracts, 2015Non-precious metal nanoparticles are attractive candidates for oxygen electrocatalytic reduction in electrochemical energy conversion devices, such as fuel cells and batteries. Here we report for the first time electrocatalytic activity of hafnium/hafnium carbide nanoparticles towards the oxygen reduction reaction (ORR).
Olga A Baturina +2 more
openaire +1 more source
Enthalpies of formation of hafnium carbides
The Journal of Chemical Thermodynamics, 1977Abstract Enthalpies of combustion of hafnium oxycarbides HfCxOy (10 samples; 0.592 ⩽ x ⩽ 0.982; 0.006 ⩽ y ⩽ 0.149) have been determined by oxygen-bomb calorimetry. The dependence of enthalpies of formation of HfCxOy on x and y is described by the equation ΔH f o ( HfC x O y ) kcal th mol −1 = 15.4 − 81.8x
A.N. Kornilov +3 more
openaire +1 more source