复合方法制备TiC/316L复合材料的组织及致密化机理

Microstructure and densification mechanism of TiC /316L composites prepared by combined method of different processes

采用温压成形和微波烧结的复合方法制备了TiC/316L不锈钢复合材料,研究了制备方法对复合材料组织与致密化的影响,并对其复合致密化机理进行了探讨。结果表明:与常规粉末冶金法相比,因为提高了压坯的生坯密度和加速烧结致密化过程的进行,采用温压成形和微波烧结的复合方法可以获得较高相对密度的复合材料试样。与常规试样的相对密度相比,采用温压成形和微波烧结制备的0%、2%、5%、10%和15%TiC的复合材料相对密度分别由84.05%、87.12%、90.61%、89.57%和89.13%提高至92.08%、93.14%、94.83%、94.22%和93.91%,且TiC颗粒分布更均匀,减少了增强体颗粒在基体中的聚集。

TiC/316L stainless steel composites were prepared by warm compaction and microwave sintering technique. The effect of the preparation method on microstructure and densification of the composites were studied, and the densification mechanism was also investigated. The results show that the composites prepared by the warm compaction and microwave sintering technique have a higher relative density than the composites prepared by conventional powder metallurgy technology, because it improves the green density of the compact and accelerates the sintering densification process. The relative densities of composites （with 0% , 2% , 5% , 10% and 15% TiC addition） increase from 84.05% , 87. 12% , 90. 61% , 89.57% and 89.13% to 92.08% , 93. 14% , 94.83% , 94.22% and 93.91% respectively, and those composites exhibit better distributing of TiC particles in matrix, diminishing agglomeration of the particles compared with the conventional powder metallurgy composites.