【摘要】 采用粉末冶金技术制备了一种低膨胀高导热支撑材料（简称ＤＧ合金），研究了烧结工艺对合金组织和性能的影响。结果表明，随烧结温度的升高和烧结时间的延长，材料抗拉性能增强，电导性能下降，１００℃时的热膨胀系数降低。合金性能的变化与烧结过程中组元的自扩散和互扩散密切相关。更多还原

【Abstract】 A support material with low expansivity and high conductivity, called DG alloy, was prepared by powder metallurgy. The effects of sintering process on its properties and microstructure were studied. The results show that with the incresase of sintering temperature and time, its tensile strength increases and its conductivity decreases. At 100 ℃ its coefficient of thermal expansion is reduced. This is closely related with self diffusion and mutual diffusion of its components during sintering.更多还原