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金属间化合物,例如Ni-Al、Ti-Al系合金,是指不同种类的原子长程有序排列构成的有较确定化学当量比的合金相.这类合金相原子间结合力强,具有高温结构材料所期望的优异性能.然而这类合金普遍存在室温塑性差、高温抗蠕变性差以及环境脆性敏感等问题.本文利用激光干涉图样对应的温度分布,空间选择性地产生Ni和Al的金属间化合物Ni3Al,以线阵或点阵的方式局域金属间化合反应形成了软、硬属性交替的薄膜材料,为改善塑性及脆性敏感等问题探索新的解决途径.对所制备样品进行的白光干涉显微镜(WLI)和原子力显微镜(AFM)分析给出了样品的表面形貌特征;X射线衍射(XRD)和纳米硬度测试给出了金属间化合物合金相及其微观硬度分布.
Intermetallic compounds, such as Ni-Al, Ti-Al-based alloys, are alloy phases of relatively definite stoichiometry composed of long-range and long-range arrangement of different kinds of atoms. Such alloys have strong bonding forces between phases and atoms, However, the properties of these alloys are generally poor at room temperature, poor creep resistance at high temperature and brittleness of the environment.In this paper, the temperature distribution of the laser interference pattern is used to produce the Ni and Al intermetallics The compound Ni3Al is formed by the linear intermetallic compound reaction in the form of a line array or a dot matrix to form thin film materials with alternating soft and hard properties and to explore new solutions to the problems of improving the plasticity and the brittleness sensitivity etc. The white light interference The morphology of the samples was analyzed by scanning electron microscopy (WLI) and atomic force microscopy (AFM). The XRD and nanohardness tests gave the intermetallic compound phase and its microhardness distribution.