氮化硅的选区激光烧结成型研究

›› 2016, Vol. 29 ›› Issue (2): 102-.

氮化硅的选区激光烧结成型研究

曹冲,沈景凤,张培志,郭方全,祁海

(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)

出版日期:2016-02-15 发布日期:2016-02-25
作者简介:曹冲(1986—),男,硕士研究生。研究方向:陶瓷快速成型。沈景凤(1968—),女,副教授。研究方向:机械设计与理论,CAD/CAE,虚拟设计。

Selective Laser Sintering Formation of Si3N4

CAO Chong,SHEN Jingfeng,ZHANG Peizhi,GUO Fangquan,QI Hai

(1.School of Mechanical Engineering,University of Shanghai for Science and Technology 200093,China;
2.Shanghai Research Institute of Materials,Shanghai 200437,China)

Online:2016-02-15 Published:2016-02-25

摘要/Abstract

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＜40 μm时,粉末易于粘附铺粉辊。

关键词: 选区激光烧结, 机械混合, 粘结剂, 氮化硅陶瓷

Abstract:

The forming principles of selective laser sintering using ceramic are described.Silicon nitride (Si3N4) 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 Si3N4 and EP powder particle size grading can effectively increase the density and strength of sintered parts.When powder particle size is close to single layer thickness,it is easy for sintering parts to move and warp;for a particle size less than 40 μm,it is easy for the powder to stick to the spread powder roller.

Key words: selective laser sintering;mechanical mixing;adhesives;silicon nitride ceramic

中图分类号:

TB321

曹冲,沈景凤,张培志,郭方全,祁海. 氮化硅的选区激光烧结成型研究[J]. , 2016, 29(2): 102-.

CAO Chong,SHEN Jingfeng,ZHANG Peizhi,GUO Fangquan,QI Hai. Selective Laser Sintering Formation of Si3N4[J]. , 2016, 29(2): 102-.