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| 稀土Sm2O3对Mo2NiB2基金属陶瓷微观组织和力学性能的影响 |
| Effect of rare earth Sm2O3 on microstructure and mechanical properties of Mo2NiB2 based cermets |
| 投稿时间：2016-11-02 |
| DOI： |
| 中文关键词: 金属陶瓷 Mo2NiB2 稀土添加剂 Sm2O3 真空液相烧结 微观组织 力学性能 |
| 英文关键词: cermet Mo2NiB2 rare earth additive Sm2O3 vacuum liquid-phase sintering microstructure mechanical property |
| 基金项目:湖北省科技攻关计划项目(2004AA101C49). |
| 作者 | 单位 | E-mail | | 杨林 | 武汉科技大学材料与冶金学院,湖北 武汉,430081 | 1558056143@qq.com | | 潘应君 | 武汉科技大学材料与冶金学院,湖北 武汉,430081 | | | 柯德庆 | 武汉科技大学材料与冶金学院,湖北 武汉,430081 | | | 徐源源 | 武汉科技大学材料与冶金学院,湖北 武汉,430081 | | | 王盼 | 武汉科技大学材料与冶金学院,湖北 武汉,430081 | |
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| 中文摘要: |
| 以NiB、Mo、Cr、V、Ni等几种粉末为基本原料,并以稀土Sm2O3为添加剂,采用真空液相烧结法制备Mo2NiB2基金属陶瓷。利用 XRD、SEM、EDS、洛氏硬度计和电子万能试验机等研究添加Sm2O3对Mo2NiB2基金属陶瓷微观组织和力学性能的影响。结果表明,添加0.3%～0.9%的Sm2O3后,金属陶瓷晶粒明显细化,组织分布更加均匀,材料的硬度和抗弯强度也得到提高。当Sm2O3添加量为0.6% 时,所得试样的晶粒最为细小,晶粒尺寸大致在0.8～3.0 μm,材料的力学性能最佳,其硬度和抗弯强度分别达到HRA88.7和1550 MPa。 |
| 英文摘要: |
| With NiB, Mo, Cr, V and Ni powders as basic raw materials, rare earth Sm2O3 as additive, Mo2NiB2 based cermets were prepared by vacuum liquid-phase sintering technology. Effects of Sm2O3 on the microstructure and mechanical properties of Mo2NiB2 based cermets were investigated by means of XRD, SEM, EDS, Rockwell hardness tester and electronic universal testing machine. The results show that, when the added amount of Sm2O3 is 0.3%～0.9%, the cermets have finer grains and more homogeneous microstructure, and their hardness and bending strength also increase. The sample with 0.6% Sm2O3 has the smallest grain size (0.8～3.0 μm) and the best mechanical properties. Its hardness and bending strength reach HRA88.7 and 1550 MPa, respectively. |
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