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材料工程  2019, Vol. 47 Issue (3): 87-93    DOI: 10.11868/j.issn.1001-4381.2017.001549
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
基于SLS/CIP工艺SiC陶瓷的制备及其性能
陈鹏1,2,3, 朱小刚1,2, 吴甲民3, 王联凤1,2, 史玉升3
1. 上海航天设备制造总厂有限公司, 上海 200245;
2. 上海复杂金属构件增材制造工程技术研究中心, 上海 200245;
3. 华中科技大学 材料科学与工程学院 材料成形与模具技术国家重点实验室, 武汉 430074
Preparation and properties of SiC ceramics via SLS/CIP process
CHEN Peng1,2,3, ZHU Xiao-gang1,2, WU Jia-min3, WANG Lian-feng1,2, SHI Yu-sheng3
1. Shanghai Aerospace Equipments Manufacturer Limited Company, Shanghai 200245, China;
2. Shanghai Research Center of Complex Metal Parts by Additive Manufacturing, Shanghai 200245, China;
3. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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摘要 以喷雾干燥的SiC-Al2O3-Y2O3造粒粉为原料,使用机械混合法得到复合粉体,通过激光选区烧结/冷等静压技术并结合液相烧结工艺制备出SiC陶瓷,对SiC陶瓷的物相组成、显微结构、抗弯强度及密度进行表征。结果表明:喷雾造粒粉平均粒径为39.43μm,球形度较高,流动性良好,适用于SLS成型;SLS成型最优参数为激光功率7W、扫描间距0.15mm、扫描速率2200mm/s、单层层厚0.15mm且CIP压力为80MPa时,SiC陶瓷素坯的性能最佳,抗弯强度为(2.23±0.10)MPa,密度为(1.31±0.05)g/cm3;在1950℃下烧结2h后,样品发生了致密化,SiC陶瓷密度为(1.95±0.17)g/cm3,相对密度为(60.81±5.31)%,抗弯强度为(55.43±4.04)MPa。
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陈鹏
朱小刚
吴甲民
王联凤
史玉升
关键词 SiC陶瓷激光选区烧结冷等静压液相烧结喷雾干燥    
Abstract:With the spray-dried SiC-Al2O3-Y2O3 powder as raw material, composite powder prepared by mechanical mixing was used to fabricate SiC ceramics by selective laser sintering/cold isostatic pressing combined with liquid phase sintering.The material phase composition, microstructure, flexural strength and density of SiC ceramics were characterized. The results show that spray-dried powder has an average diameter of 39.43μm with fine sphericity and flowability, which is suitable for SLS process. With the optimum parameters (laser power of 7W, scanning speed of 2200mm/s, scanning space of 0.15mm and layer thickness of 0.15mm) and CIP pressure of 80MPa, the green bodies show the superior quality with flexural strength of (2.23±0.10)MPa and bulk density of (1.31±0.05)g/cm3. After being sintered at 1950℃ for 2h, samples are densified that the bulk density and relative density of SiC ceramics are (1.95±0.17)g/cm3 and (60.81±5.31)%, respectively and the flexural strength is (55.43±4.04)MPa.
Key wordsSiC ceramics    selective laser sintering    cold isostatic pressing    liquid phase sintering    spray drying
收稿日期: 2017-12-17      出版日期: 2019-03-12
中图分类号:  TB321  
通讯作者: 吴甲民(1984-),男,博士,讲师,硕士生导师,研究方向为陶瓷增材制造技术及其应用,联系地址:湖北省武汉市洪山区珞喻路1037号华中科技大学东八楼附楼快速制造中心203室(430074),E-mail:jiaminwu@hust.edu.cn     E-mail: jiaminwu@hust.edu.cn
引用本文:   
陈鹏, 朱小刚, 吴甲民, 王联凤, 史玉升. 基于SLS/CIP工艺SiC陶瓷的制备及其性能[J]. 材料工程, 2019, 47(3): 87-93.
CHEN Peng, ZHU Xiao-gang, WU Jia-min, WANG Lian-feng, SHI Yu-sheng. Preparation and properties of SiC ceramics via SLS/CIP process. Journal of Materials Engineering, 2019, 47(3): 87-93.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.001549      或      http://jme.biam.ac.cn/CN/Y2019/V47/I3/87
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