颗粒尺寸及组合对SLS碳化硅预制体精度的影响

中国机械工程 ›› 2013, Vol. 24 ›› Issue (13): 1826-1830.

颗粒尺寸及组合对SLS碳化硅预制体精度的影响

刘秀梅1,2;徐志锋1;余欢1

1.南昌航空大学轻合金加工科学与技术国防重点学科实验室，南昌，330063
2.江铃汽车股份有限公司，南昌，330001

出版日期:2013-07-10 发布日期:2013-07-11
基金资助:
航空科学基金资助项目(2011ZE56007)；江西省自然科学基金资助项目(2010GZC0159)
Aviation Science Foundation of China（No. 2011ZE56007）;
Jiangxi Provincial Natural Science Foundation of China（No. 2010GZC0159）

Influences of Particle Size and Combination on Forming Accuracy of SLS Silicon Carbide Preforms

Liu Xiumei1,2;Xu Zhifeng1;Yu Huan1

1.National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang,330063
2.Jiangling Motors Corporation,Ltd.,Nanchang,330001

Online:2013-07-10 Published:2013-07-11
Supported by:

Aviation Science Foundation of China（No. 2011ZE56007）;
Jiangxi Provincial Natural Science Foundation of China（No. 2010GZC0159）

摘要/Abstract

摘要：

采用热法包覆方法制备了不同颗粒组合的碳化硅陶瓷粉末，并利用选区激光烧结(SLS)工艺制备了碳化硅陶瓷预制体，研究了颗粒尺寸及组合对激光烧结陶瓷预制体成形精度的影响规律。结果表明：颗粒尺寸及组合对激光烧结陶瓷预制体成形精度的影响显著，预制体翘曲量随颗粒尺寸的增大而减小，表面粗糙度和尺寸误差均随颗粒尺寸的增大而增大;相对于单一颗粒，由双尺寸颗粒组合制备的预制体的翘曲量减小了11%~50%，表面粗糙度Ra值减小了12%~20%，尺寸误差减小了38%~79.6%。

关键词: 热法包覆碳化硅, 选区激光烧结(SLS), 预制体, 精度

Abstract:

Laser sintered SiC ceramic powder with different combinations were fabricated by thermal-coating, and SiC ceramic preforms were produced by SLS. Influences of the particle size and combination on the forming accuracy of the preforms were discussed. The results of this investigation demonstrate that the size and combination of the particles have a significant impact on the forming accuracy of the laser sintered ceramic preforms. The warpage of the preforms decreases as the size of particle is inereased, while dimensional tolerance and surface roughness increase. Compared to single-size particles, the warpage of the preform which fabricated by the combination of dual-size particles is decreased by 11%~50%, surface roughness Ra is decreased by 12%~20%, dimensional tolerance is reduced by about 38%~79.6%.

Key words: thermal-coated SiC, selective laser sintering(SLS), preform, accuracy

中图分类号:

TB333

刘秀梅1, 2, 徐志锋1, 余欢1. 颗粒尺寸及组合对SLS碳化硅预制体精度的影响[J]. 中国机械工程, 2013, 24(13): 1826-1830.

LIU Xiu-Mei-1, 2, XU Zhi-Feng-1, TU Huan-1. Influences of Particle Size and Combination on Forming Accuracy of SLS Silicon Carbide Preforms[J]. China Mechanical Engineering, 2013, 24(13): 1826-1830.

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