| 引用本文: | 王江,刘凯,孙华君,谭沅良,吴添,马成飞,武娜.激光增材制造用SiC粉末制备及成形工艺探索[J].材料科学与工艺,2018,26(2):9-14.DOI:10.11951/j.issn.1005-0299.20170092. |
| WANG Jiang,LIU Kai,SUN Huajun,TAN Yuanliang,WU Tian,MA Chengfei,WU Na.Study on preparation and forming process of SiC powder for laser additive manufacturing[J].Materials Science and Technology,2018,26(2):9-14.DOI:10.11951/j.issn.1005-0299.20170092. |
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| 摘要: |
| 为制备高强度复杂形状SiC陶瓷零件, 以酚醛树脂(PF)为粘接剂, 分别采用机械混合法(SPM)和搅拌蒸发法(SPC)制备两种SiC复合粉末, 并对两种粉末进行了SEM电镜扫描、SLS成形、碳化和渗硅反应烧结处理.研究表明, 在激光功率10 W, 分层厚度0.1 mm, 扫描速2 000 mm/s, 扫描间距0.2 mm时, SLS坯体密度大(1.259 g/cm3), 生产效率高.利用SPC粉末制得的SLS坯体内部孔隙更多, 碳化和渗硅烧结后坯体密度明显增加.采用SPC粉末所制零件最终力学性能更好, 更适于生产.在最优工艺条件下, 制备了复杂形状的高性能SiC零件.
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| 关键词: SiC复合粉末 搅拌蒸发法 机械混合法 激光选区烧结 密度 |
| DOI：10.11951/j.issn.1005-0299.20170092 |
| 分类号:TN249 |
| 文献标识码:A |
| 基金项目:材料成形与模具技术国家重点实验室开放基金资助项目(P2017-002)；中山市新型研发机构产业化项目(2016F2FC0021)；国家大学生创新训练计划；武汉理工大学自主创新研究基金项目(2017-CL-B1-05). |
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| Study on preparation and forming process of SiC powder for laser additive manufacturing |
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WANG Jiang1, LIU Kai1, SUN Huajun1, TAN Yuanliang1, WU Tian1, MA Chengfei1, WU Na2
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(1.School of Material Science and Engineering,Wuhan University of Technology,Wuhan 430070,China; 2.Wuhan Science and Technology Development Promotion Center,Wuhan 430023,China)
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| Abstract: |
| To fabricate SiC parts with high performance and complex structure, Phenol-formaldehyde resin(PF) was applied as adhesive, SiC-PF mixing powder (SPM) and SiC-PF Coating powder(SPC) were prepared by mechanical mixing and stirring evaporation method.SEM analysis, Selective Laser Sintering (SLS), carbonization and siliconizing process were carried out to characterize the formation of these two materials.The results indicated that the powder fabricated by SLS had high body density and production efficiency when the laser power, layer thinkness, scanning speed and hatch spacing were respectively set at 10 W, 0.1 mm, 2 000 mm/s and 0.2 mm.It was found that the body formed by SPC powder had more micro pores and the body density increased apparently after carbonization and siliconizing process.SPC parts have higher density and it is more suitable for production.Complex ceramic parts were fabricated under the optimum process conditions.
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| Key words: SiC composite powder stirring evaporation method mechanical mixing method selective laser sintering density |
