NiAl shape memory alloy by powder metallurgy method

被引：0
|
作者：
Man, C.H. [1 ]
Chung, C.Y. [1 ]
机构：
[1] Physics and Materials Science Dept., City University of Hong Kong, KLN, Hong Kong, Hong Kong
来源：
Materials Science Forum | 2000年 / 327卷
关键词：
Ball milling - Binary alloys - Differential scanning calorimetry - Differential thermal analysis - Martensitic transformations - Metallographic microstructure - Nickel powder metallurgy - Scanning electron microscopy - Shape memory effect - Sintering - Thermoelasticity - X ray diffraction analysis;
D O I：
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中图分类号：
学科分类号：
摘要：
Mechanical alloying in high-energy ball-milling machine was used to fabricate the NiAl shape memory alloy. The effect of milling time on the mechanical properties was investigated. The microstructures and phase transformations of NiAl were studied by scanning electron microscope (SEM), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and dynamic thermal analysis (DTA). Lamella micro-structures was found in the SEM examination and they were confirmed to have the martensite structure by XRD analysis. Results from DSC thermal analysis revealed that the sintered-compact exhibited thermoelastic transformation. Besides, the martensitic transformation was found to have suppressed by the presence of Ni5Al3 precipitates in some of the ball-milled specimens.
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页码：497 / 500
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