粉末注射成型金刚石制品的烧结工艺  

Sintering Process of Diamond Products by Powder Injection Molding

作　　者：伍俏平[1] 邓朝晖[1] 潘占[2] 言佳颖[1] 万林林[1] 

机构地区：[1]湖南科技大学机电工程学院湖南,湖南湘潭411201 [2]湖南大学国家高效磨削工程技术研究中心,长沙410082

出　　处：《硅酸盐学报》2013年第9期1207-1213,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51205126,50775069)项目;湖南省自然科学基金青年人才联合培养项目(12JJB006)资助

摘　　要：对采用粉末注射成型技术制备的金刚石制品的烧结工艺进行了研究。通过观测金刚石制品的形貌、相对密度和抗弯强度,分析了烧结温度、烧结气氛、保温时间及升温速率等对金刚石制品烧结性能的影响,优化了烧结工艺参数。结果表明:随烧结温度的提高或保温时间的延长,金刚石制品的相对密度线性增大后趋于平缓,抗弯强度呈现出先增大后下降趋势;在真空气氛中烧结有利于制品烧结致密化和力学性能的提高;过高的升温速率会引起金刚石制品的烧结变形,过低的升温速率会造成金刚石制品处于加热过程的时间过长,影响制品性能。优化的烧结工艺参数为:烧结气氛为真空烧结,烧结温度为920℃,保温时间为10min,升温速率为5℃/min。The sintering process of diamond products prepared by powder injection molding technology was discussed. Effects of parameters （i.e., sintering temperature, sintering atmosphere, time and heating speed） on the sintering performance was investigated via the analysis of morphological structure and measurement of relative density and tensile strength of the sintered diamonds products. The experimental results indicate that the relative density of the products increases, and the tensile strength increases firstly and then decreases with increasing the sintering temperature or time. The sintering of the products in a vacuum atmosphere can improve the densification and mechanical properties of the products. The products appear a sintering deformation at a high heating rate, and the performance of the products decreases at a low heating rate. The optimized sintering process can be obtained at a heating rare of 5℃/min and a sintering temperature of 920℃ in vacuum atmosphere for 10 min.

关 键 词：金刚石制品 粉末注射成型 烧结参数 烧结性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]