| 热压烧结原位合成Coss/Co3Mo2Si复合材料 |
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| 引用本文： | 邹二勇,刘济慧,邹欣伟. 热压烧结原位合成Coss/Co3Mo2Si复合材料[J]. 粉末冶金技术, 2020, 38(3): 211-216. DOI: 10.19591/j.cnki.cn11-1974/tf.2020.03.008 |
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| 作者姓名： | 邹二勇 刘济慧 邹欣伟 |
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| 作者单位： | 1.嘉兴南洋职业技术学院机电工程分院, 嘉兴 314031 |
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| 基金项目： | 山西省重点研发计划资助项目201803D121027太原科技大学博士科研启动基金资助项目20162006 |
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| 摘 要： | 为优化过渡金属硅化物的中低温脆性, 以金属粉末为原料通过热压烧结制备了Co3Mo2Si增强、Co基固溶体(Coss)增韧Coss/Co3Mo2Si复合材料, 并对其微观组织结构及力学性能进行了研究。结果表明: Coss/Co3Mo2Si复合材料主要由Co3Mo2Si三元金属硅化物相和Coss相组成, 两相均匀分布; Co3Mo2Si三元金属硅化物相质量分数增加材料的硬度升高, 但抗弯强度降低, Coss相质量分数增加材料的相对密度和抗弯强度均升高; 抗弯强度的最大值可由单一Co3Mo2Si相的335.7MPa提高到Coss/Co3Mo2Si复相的756.2MPa。
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| 关 键 词： | 过渡金属硅化物 热压烧结 原位合成 硬度 抗弯强度 |
| 收稿时间： | 2019-03-26 |
In-situ synthesis of Coss/Co3Mo2Si composite by hot-pressing sintering |
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| Affiliation: | 1.School of Mechanical and Electrical Engineering, Jiaxing Nanyang Polytechnic Institute, Jiaxing 314031, China2.School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China |
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| Abstract: | To optimize the brittleness of transition metal silicides at low and medium temperature, the Co3Mo2Si reinforced and Co-based solid solution (Coss) toughened Coss/Co3Mo2Si composites were in-situ synthetised by hot pressing sintering, using metal powders as raw materials, and the microstructure and mechanical properties of Coss/Co3Mo2Si composites were studied. The results show that the Coss/Co3Mo2Si composites mainly consist of Co3Mo2Si ternary metal silicide phase and Coss phase in uniform distribution. With the increase of Co3Mo2Si ternary metal silicide phase weight fraction, the hardness increases but the bending strength decreases; with the increase of Coss phase weight fraction, the relative density and bending strength increase. The maximum bending strength can be increased from 335.7 MPa of Co3Mo2Si single phase to 756.2 MPa of Coss/Co3Mo2Si dual phases. |
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