Layered structure of Ni-Al multi-layered metal-intermetallic composites fabricated by in-situ reactions

• 作者: 夏振海 孙宝德 张佼
• 来源期刊: 中国有色金属学会会刊（英文版）
• 学科: 工学
• 关键词: intermetallic compound in-situ reaction layered structure back scattering photo
• 年，卷（期）: 2004,（6）
• 页码范围: 1117-1122
• 页数: 6页
• 分类号: TG111.6
• 语种: 英文

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 Ni2 Al3 and there exists a like two-phase field between NiAl3 and Ni2 Al3. The high temperature phases like NiAl and Ni3 Al 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.