氮化硅的选区激光烧结成型研究  

Selective Laser Sintering Formation of Si_3N_4

作　　者：曹冲[1,2] 沈景凤[1] 张培志[2] 郭方全[2] 祁海[2] 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海材料研究所,上海200437

出　　处：《电子科技》2016年第2期102-104,108,共4页Electronic Science and Technology

摘　　要：应用陶瓷粉末的选区激光烧结(SLS)成型原理,以氮化硅(Si_3N_4)和环氧树脂(EP)为材料,采用机械混合的方法制备SLS用Si_3N_4陶瓷粉末,测试其流动性和松装密度,进行选区激光烧结实验并制备试件。采用扫描电子显微镜观察烧结件的微观形貌,测试其三点抗弯强度。结果表明,优化Si_3N_4和EP粉末的粒径级配可有效增大铺粉密度、烧结件的致密度和强度。粉末粒径接近单层厚度时烧结件易发生移动和翘曲,粒径<40μm时,粉末易于粘附铺粉辊。The forming principles of selective laser sintering using ceramic are described. Silicon nitride （Si3N4） and epoxy resin （EP） are used as raw materials for selective laser sintering by mechanical mixing. The flowability and apparent density are tested and selective laser sintering experiments are conducted. The morphology of sintered parts are observed by scanning electron microscope with its three-point bending strength tested. The results show that the optimization of Si3N4 and EP powder particle size grading can effectively increase the density and strength of sintered parts. When powder particle size move and warp; for a particle size less than 40 μm, is close to single layer thickness, it is easy for sintering parts to it is easy for the powder to stick to the spread powder roller.

关 键 词：选区激光烧结 机械混合 粘结剂 氮化硅陶瓷 

分 类 号：TB321[一般工业技术—材料科学与工程]