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| 尼龙12覆膜铝粉激光烧结成形件的性能研究 | |
| 引用本文： | 闫春泽,史玉升,杨劲松,徐林. 尼龙12覆膜铝粉激光烧结成形件的性能研究[J]. 材料科学与工艺, 2009, 0(5): 608-611 |
| 作者姓名： | 闫春泽 史玉升 杨劲松 徐林 |
| 作者单位： | 华中科技大学材料成形与模具技术国家重点实验室;中国地质大学(武汉)材料科学与化学工程学院; |
| 基金项目： | 国家科技型中小企业创新基金资助项目(05C262142011059) |
| 摘 要： | 常用的机械混合法很难将尼龙12和金属粉末材料混合均匀,容易出现偏聚,因而会造成选择性激光烧结(SLS)成形件中存在局部强度弱点、翘曲等缺陷.为此,提出了通过溶液沉淀法制备SLS成形用尼龙12覆膜铝粉,利用扫描电镜观察了尼龙12覆膜铝粉及烧结件断口的微观形貌,研究了铝粉含量及粒径对SLS成形件性能的影响.结果表明:尼龙12均匀地包覆在铝粉表面,无裸露铝粉颗粒存在,表明成功制备得到了尼龙12覆膜铝粉材料;当铝粉含量从0增大到50%时,烧结件的热变形温度、拉伸强度、弯曲强度、弯曲模量及硬度比纯尼龙烧结件分别提高了87℃、10.4%、62.1%、122.3%及70.4%;烧结件的拉伸强度、断裂伸长率及冲击强度均随着铝粉平均粒径的减小而增大. |
| 关 键 词： | 选择性激光烧结 尼龙12 铝粉 溶剂沉淀法 |
Properties of the selective laser sintered specimens of nylon12-coated aluminum powders |
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| YAN Chun-ze,,SHI Yu-sheng,YANG Jin-song,XU Lin. Properties of the selective laser sintered specimens of nylon12-coated aluminum powders[J]. Materials Science and Technology, 2009, 0(5): 608-611 | |
| Authors: | YAN Chun-ze SHI Yu-sheng YANG Jin-song XU Lin |
| Affiliation: | YAN Chun-ze1,2,SHI Yu-sheng1,YANG Jin-song1,XU Lin1(1.State key Laboratory of Material Processing , Die & Mould Technology,Huazhong University of Science , Technology,Wuhan 430074,China,2.Faculty of Material Science , Chemistry Engineering,China University of Geosciences,China) |
| Abstract: | It is difficult for the commonly used mechanical mixing method to uniformly disperse the aluminum powders in the nylon12 matrix,and aluminum coagulation is formed.Therefore,nylon12-coated aluminum powders for the application in the selective laser sintering(SLS) were prepared by a solvent-precipitation method.Microcosmic morphologies of the composite powders were observed using SEM.The effects of aluminum contents and average particle sizes of aluminum powders on the properties of SLS parts were studied.Res... |
| Keywords: | selective laser sintering nylon12 aluminum powder solvent-precipitation method |
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