【摘要】 研究了Si-SiC及Si-SiC-WC陶瓷的液相热压烧结性能。研究表明,在Si-SiC材料中,硅含量的增加(至25 vol.％)能够使烧结体在较低的热压温度下致密,并且硅液相的存在抑制了烧结体的晶粒长大,提高了碳化硅制品的强度。在Si-SiC中加入一定量的WC,能够提高烧结体的相对密度及抗弯强度。更多还原

【Abstract】 The liquid hot-pressing sintering behaviour of Si-SiC and Si-SiC-WC ceramics was studied. The results show that the increase of silicon (to 25 vol%) made ths sintering body densificated at a lower temperature; and by the occurrance of liquid silicon, the grain growth was restricted. Therefore, the strength of SiC article with 25 vol%Si was higher than that of with 5vol.% Si. The addition of some WC enhanced the densification and strengthened the Si-SiC ceramics.更多还原