期刊
CHIANG MAI JOURNAL OF SCIENCE
卷 47, 期 2, 页码 297-303出版社
CHIANG MAI UNIV, FAC SCIENCE
关键词
micro-MIM; nickel-titanium; elemental powder; phase transformation temperature
资金
- National Metal and Materials Technology Center (MTEC), Thailand [P1751455]
- Taisei Kogyo (Thailand) Co., Ltd. [P1751455]
NiTi alloys are often used in biomedical applications. The alloys are required to be tailored for suitable operating temperatures. The phase transformation temperatures (PTT) were optimised for shape memory or super-elasticity properties. Micro metal injection moulding (micro-MIM) is a process that can fabricate millimetre-size metal parts with very complex shapes. It is adapted from MIM with significantly smaller injection volume for improved control of dimensions. NiTi alloys with varied Ni contents (45-55 at.%) were fabricated by micro-MIM and sintered at 1150 degrees C for 2 hours under high vacuum (< 10(-4) Pa). X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive x-ray spectroscopy (EDS) and differential scanning calorimeter (DSC) measurements were performed in order to characterise the sintered samples. The results indicated that as Ni contents increased, PTTs were decreased for all transformation temperatures (A(s), A(p), A(f), M-s, M-p and M-f). Moreover, at room temperature (25 degrees C), in the 50Ni-50Ti and 55Ni-45Ti samples, the austenitic B2 NiTi is present, whereas the 45Ni-55Ti sample contains martensitic B19' NiTi.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据