| 凝胶注模成型制备多孔NiTi合金工艺研究 |
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| 引用本文： | 望军. 凝胶注模成型制备多孔NiTi合金工艺研究[J]. 重庆科技学院学报(自然科学版), 2018, 0(1): 121-124. DOI: 10.3969/j.issn.1673-1980.2018.01.028 |
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| 作者姓名： | 望军 |
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| 作者单位： | 重庆科技学院冶金与材料工程学院,重庆,401331 |
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| 基金项目： | 重庆市基础与前沿研究计划项目"晶须掺杂WC-Ni硬质合金中晶须-基体界面结合机理的研究" |
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| 摘 要： | 以甲基丙烯酸羟乙酯为单体、油酸为分散剂,采用凝胶注模成型工艺制备NiTi形状记忆合金生坯,经1 050℃下真空保温6 h获得多孔NiTi形状记忆合金。研究发现,随着固相含量的增加,浆料黏度上升,当固相含量为43%时其流动性已无法满足注模的需求;当固相含量为43%的浆料加入质量分数为1%的油酸分散剂并经过40 min的球磨处理后,其流动性得到了改善并能够满足注模需求;烧结体晶粒发育良好,合金中除了NiTi相外还有少量的Ni3Ti和Ni2Ti等杂质相。
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| 关 键 词： | 粉末冶金 固相含量 黏度 球磨 相 powder metallurgy solid content viscosity ball milling phase |
Study on the Preparation of Porous NiTi Alloy by Gel-Casting |
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| WANG Jun. Study on the Preparation of Porous NiTi Alloy by Gel-Casting[J]. Journal of Chongqing University of Science and Technology:Natural Science Edition, 2018, 0(1): 121-124. DOI: 10.3969/j.issn.1673-1980.2018.01.028 |
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| Authors: | WANG Jun |
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| Abstract: | In this paper,hydroxyethyl methacrylate is taken as a monomer,and oleic acid as a dispersant.Porous NiTi shape memory alloy is prepared by a gel-casting method,then it is sintered at 1050℃in vacuum for 6h to get porous NiTi shape memory alloy.The results show that slurry fluidity decreases with the increase of solid con-tent.Fluidity has been unable to meet the requirements of molding when the solid content is 43%.The slurry fluid-ity is improved and can meet the requirement of gel-casting when the slurry added 1%oleic acid and is treated by ball milling for 40min.The sinter has good grains.In addition to the NiTi phase,there are a few impurity phases such as Ni3Ti and Ni2Ti in the sinter. |
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