Basic Research to Develop Dual Multi-phase Intermetallic Alloys as Next-generation Type Heat Resistant Materials

对由两种ni3x型化合物组成的两相金属间化合物合金进行了合金设计、组织发育、组织和组成相稳定性等方面的研究，寻求提高合金力学性能和耐高温性能的合金元素及其最佳含量。此外，还开发了熔融/铸造和粉末冶金等初级制造工艺以及热处理、机加工和表面改性等二级制造工艺。在与工业界的合作下，目前的两相金属间合金已应用于各种高温结构、耐磨和耐腐蚀材料。

For two-phase intermetallic alloys composed of two kinds of Ni3X-type compounds, alloy design, microstructural development and stabilities of microstructures and constituent phases were studied, seeking the alloying elements and their optimum contents enhancing high-temperature properties such as mechanical and environment-proof properties. Also, the primary fabrication processes by melting/casting and powder metallurgy as well as the secondary fabrication processes by heat treatment, machining and surface modification were developed. In collaboration with industries, the present two-phase intermetallic alloys were applied to various kinds of high-temperature structural, wear resistance and corrosion resistance materials.