【摘 要】
：
The precipitating kinetics of Ni75Al17Zn8 alloy was studied at both 873K and 973K by microscopic phase-field model. The calculation results show that the order-
【机 构】
：
College of Materials Science and Engineering,State Key Laboratory of Solidification Processing
论文部分内容阅读
The precipitating kinetics of Ni75Al17Zn8 alloy was studied at both 873K and 973K by microscopic phase-field model. The calculation results show that the order-disorder transformation experiences the matrix → lowly-ordered L10 phase → L12 phase at 973 K. And the nucleation of L12 particles belongs to the spinodal decomposition mechanism. As temperature increases, orderings of Al and Zn atoms are resisted, but coarsening of L12 particles is promoted. The value of coarsening kinetic exponents approaches to 1/2. In addition, the discussions about Ni-Al anti-site defect and Zn substitutions for Ni site and Al site exhibit that the higher the temperature, the more distinctive the Ni-Al anti-site defect, but the less the Zn substitution.
其他文献
The feasibility of using sodium sulfide as the sole modifier for the flotation of Xinhua molybdenite ore was examined. The potential mechanisms involved in the
The conditions of ZnO-Al2O3 aqueous suspensions and slip casting were optimized to obtain dense green compacts and further to obtain high density ZnO-Al2O3 cera
在城市景观中应用植物色彩时需要遵循必要的设计原则，即色彩规划和城市形象的统一性、色彩和时间的和谐性以及色彩距离感与城市景观设计的合理性。本文结合,某城市花园景观设
Micro-arc oxidation (MAO) coating was prepared on Ti6Al4V alloy surface and its characterizations were detected by Vickers hardness tester, profilometer, scanni
A new apparatus was designed to measure the electromagnetic force and a computational study of the traveling magnetic field (TMF) and its application to the Ga-
The SmBaCuMO5+δ (M=Fe,Co,Ni) (SBCM) powders were synthesized by the citrate sol-gel method and the powders were sintered to ceramic pellets.The powders and sin
Indium tin oxide (ITO) nanopowders were prepared by a modified chemical co-precipitation process. The influence of different SnO2 contents on the decomposition
La2/3Sr1/3MnO3/La1.4Sr1.6Mn2O7 composites with arbitrary weight percentage were prepared using a one-step sofid-state reaction method.The experimental results d
Alloys with composition Ho5Fe3Co12 and Ho33.3Co66.7 were prepared and examined by X-ray diffractometer and automatic battery testing instrument.The electrochemi
Copper sheet with grain size of 30-60 μm was processed by plastic deformation of asymmetrical accumulative rolling-bonding (AARB) with the strain of 3.2. The e