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以Ti4 0 Zr4 0 Ni2 0 合金为研究对象 ,用铜模吸铸法制备出直径为 3mm的致密单相准晶棒 ,通过维氏显微硬度测定和单向压缩实验方法研究了该合金的室温力学性能 .结果表明 :Ti4 0 Zr4 0 Ni2 0 准晶具有良好的弹性变形能力 ,室温弹性应变可达 1 2 5 % .同时 ,它具有相对高的室温硬度 (约 5 5GPa) ,是普通Ti合金的 1 5倍 .Ti4 0 Zr4 0 Ni2 0 准晶具有低杨氏模量 (约 4 3GPa)和高Poisson比 (约 0 4 8)特性 ,室温单向压缩时主要发生弹性变形 ,断裂方式为解理断裂 ,属脆性断裂 ,其断裂强度为 5 4 2MPa .
Taking Ti4 0 Zr4 0 Ni2 0 as the research object, a dense single-phase quasi-crystal rod with a diameter of 3 mm was prepared by copper mold suction casting. The Vickers hardness and the uniaxial compression test were used to study the room temperature Mechanical properties.The results show that the quasicrystal of Ti4 0 Zr4 0 Ni2 0 has good elastic deformability and elastic strain up to 125% at room temperature.At the same time, it has relatively high room temperature hardness (about 55GPa) .Ti4 0 Zr4 0 Ni2 0 quasicrystals have the properties of low Young’s modulus (about 4 3GPa) and high Poisson’s ratio (about 0 48). The uniaxial compression at room temperature mainly occurs elastic deformation and the fracture mode is solution Reasonable fracture, a brittle fracture, the fracture strength of 5 42MPa.