| 挤压致密超细WC/纳米Al2O3弥散强化铜基复合材料的组织性能研究 |
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| 引用本文： | 张小红,申景园,孙宇,胡连喜. 挤压致密超细WC/纳米Al2O3弥散强化铜基复合材料的组织性能研究[J]. 粉末冶金技术, 2019, 37(6): 422-427. DOI: 10.19591/j.cnki.cn11-1974/tf.2019.06.004 |
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| 作者姓名： | 张小红 申景园 孙宇 胡连喜 |
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| 作者单位： | 1.无锡职业技术学院, 无锡 214121 |
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| 摘 要： | 以纳米Al2O3颗粒、超细WC粉末、工业纯Cu粉末为原料, 通过热挤压致密获得了超细WC/纳米Al2O3弥散强化铜基(WC-Al2O3/Cu)复合材料, 研究了挤压态WC-Al2O3/Cu复合材料的微观组织及力学性能。结果表明: 成分为5% WC-2% Al2O3/Cu和10% WC-2% Al2O3/Cu (质量分数)的两种原料粉末, 经机械球磨、冷压、真空烧结和热挤压后, 其相对密度均达到了99%以上, 超细WC和纳米Al2O3强化相颗粒呈均匀弥散分布, 具有很好的导电性及力学性能; 其中, 5% WC-2% Al2O3/Cu复合材料的综合性能更佳, 其抗拉强度达到235.06 MPa, 延伸率为15.47%, 导电率可达85.28% IACS, 软化温度不低于900℃。
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| 关 键 词： | 铜基复合材料 弥散强化 挤压致密 显微组织 力学性能 |
| 收稿时间： | 2019-04-12 |
Study on the microstructure and properties of dispersion-reinforced Cu-based composites by ultrafine WC and nano-sized Al2O3 particles via extrusion densification |
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| Affiliation: | 1.Wuxi Institute of Technology, Wuxi 214121, China2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Chain |
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| Abstract: | The dispersion-reinforced Cu-based composites by ultrafine WC and nano-sized Al2O3 particles (WC-Al2O3/Cu)were obtained by hot extrusion densification using the nano-sized Al2O3 particles, ultrafine WC powders, and industrial pure copper powders as raw materials. The microstructures and performances of the extruded WC-Al2O3/Cu composites were investigated. In the results, the relative density of the 5%WC-2%Al2O3/Cu and 10%WC-2%Al2O3/Cu composites by mass is over99% after mechanical milling, cold pressing, vacuum sintering, and hot extrusion. At this meantime, the ultrafine WC and nano-sized Al2O3 particles distribute homogenously in the Cu matrix, resulting in high mechanical strength and excellent electrical conductivity. The tensile strength, elongation, and electrical conductivity of 5%WC-2%Al2O3/Cu composites are 235.06 MPa, 15.47%, and 85.28% IACS, respectively, and the softening temperature is above 900℃, showing a better comprehensive performances. |
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