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提高材料耐高温性能是为了满足发动机阀门、涡轮机叶片、火箭发动机用料的需求。一位加利福尼亚的研究人员应用涂覆的方法可以保留难熔金属熔点一半的温度对应的金属的强度。采用的金属是系列电铸难熔金属包括镍、镍一钻、镍一锰。 具体工艺为:添加粒径小于1μm的高弥散强度的高能级结构的氧化物,诸如氧化钍或氧化锆混合物作为涂覆用材料。以上这些氧化物粒子的作用是
To improve the material high temperature performance is to meet the needs of engine valves, turbine blades, rocket engine materials. A California researcher uses a coating method that preserves the strength of the metal at half the temperature of the melting point of the refractory metal. The metal used is a series of electroformed refractory metals including nickel, nickel-cobalt, nickel-manganese. The specific process is as follows: adding a high-dispersion-strength oxide with a high dispersion of particle size less than 1 μm, such as a thorium oxide or zirconium oxide mixture as a coating material. The role of these oxide particles above is