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

针对由两种Ni 3X型化合物组成的两相金属间合金，研究了合金设计、显微组织发展以及显微组织和组成相的稳定性，寻找提高力学性能和环保性能等高温性能的合金元素及其最佳含量。开发了熔铸和粉末冶金的一次加工工艺以及热处理、机械加工和表面改性的二次加工工艺。与工业界合作，目前的双相金属间化合物合金被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.