SiC-WC复合陶瓷材料的研究

Studies on SiC-WC Composite Ceramic Materials

本文对亚微细SiC—WC复合陶瓷粉末的制备及热压烧结性能进行了研究。在探讨烧结体密度、强度随热压条件变化的基础上得出了适合于SiC—WC复合陶瓷的热压工艺条件。在此条件下烧结体的相对密度达99％以上,弯曲强度达1019MN/m^2。研究表明,在SiC中加入5～25Vol.％的WC,能改善材料的烧结性能,加快致密化速率,并能提高烧结体的强度与韧性。

The preparation of submicron powders of SiC-WC composite ceramics and their hot-pressing sintering behaviour were studied. Based on the experiments of density and flexure strength changed with the hot-pressing conditions, the hot-pressing technique conditions suitable for SiC-WC composite ceramics were obtained. The relative density of the final sinter was over 99% and the flexure strength was reached to 1019MN / m2. The results show that the addition of 5~ 25 Vol.% WC has improved the sintering behaviour of SiC ceramics, accelerated the .densification and increased the flexure strength and toughness.