摘要
Systematical experiments were done at five temperature levels: （500 ℃,） （630 ℃,） （900 ℃,） （1 000 ℃） and （1 100 ℃） to illuminate the layer structure of the multi-layered metal-intermetallic composites of Ni-Al system that were fabricated by a previously reported simple and cost-effective method. The analysis of back scattering photos and XRD examination of specimens reveal that the look like single compound layer is composed of several different components. The primary phase produced during reaction is Ni2Al3 and there exists a like two-phase field between NiAl3 and Ni2Al3. The high temperature phases like NiAl and Ni3Al are also found at low temperature. The results indicate that the key driving force of in-situ reaction is not temperature, but the atom concentration.
Systematical experiments were done at five temperature levels: (500 ℃,) (630 ℃,) (900 ℃,) (1 000 ℃) and (1 100 ℃) to illuminate the layer structure of the multi-layered metal-intermetallic composites of Ni-Al system that were fabricated by a previously reported simple and cost-effective method. The analysis of back scattering photos and XRD examination of specimens reveal that the look like single compound layer is composed of several different components. The primary phase produced during reaction is Ni_2Al_3 and there exists a like two-phase field between NiAl_3 and Ni_2Al_3. The high temperature phases like NiAl and Ni_3Al are also found at low temperature. The results indicate that the key driving force of in-situ reaction is not temperature, but the atom concentration.
出处
《中国有色金属学会会刊：英文版》
CSCD
2004年第6期1117-1122,共6页
Transactions of Nonferrous Metals Society of China
关键词
金属互化物
分层结构
反射散射相片
镍-铝合金
intermetallic compound
in-situ reaction
layered structure
back scattering photo
