【摘要】 本文研究了β—SiC亚微细粉末的合成及其热压烧结性能。以SiO₂和C粉为主要原料制得了粒径<0.5μ的SiC粉末,并在一定的热压温度和压力下通过研究烧结体密度、强度随保温保压时间的变化关系,得出了该粉末的热压烧结工艺,制得了相对密度99％以上、抗弯强度600MN/m²左右的烧结体。更多还原

【Abstract】 The Synthesis of Submicron β--SiC powders and its sintering behaviour have been studied. With the main raw materials of SiO₂ and c powders, the SiC pow- ders possessing particle size less than 0.5μ were obtained, and through the ob- servation of the relations among the sintering density, flexure strength and the maintenance time of temperatures and pressures as given, the hot--pressing tec-- hnique suitable for β--SiC has been determined. The resulting siater has a relat-- ive density of 99% and flexure strength of 600MN/m².更多还原