| HfN含量对ZrB2基陶瓷材料微观组织和力学性能的影响 |
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| 引用本文： | 谢俊彩,宋金鹏,高姣姣,曹磊.HfN含量对ZrB2基陶瓷材料微观组织和力学性能的影响[J].粉末冶金技术,2019,37(6):416-421. |
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| 作者姓名： | 谢俊彩 宋金鹏 高姣姣 曹磊 |
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| 作者单位： | 1.太原理工大学机械与运载工程学院, 太原 030024 |
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| 基金项目： | 国家自然科学基金资助项目51875388国家自然科学基金资助项目51405326 |
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| 摘 要： | 以HfN为增强剂、Ni为金属添加剂, 通过真空热压烧结工艺制备了ZrB2-HfN陶瓷材料, 研究了HfN含量(质量分数)对ZrB2基陶瓷材料微观组织和力学性能的影响。结果表明: 随着HfN质量分数从5%增加到15%, ZrB2-HfN陶瓷材料的硬度和抗弯强度先增大后减小, 而断裂韧度逐渐增大; 当HfN质量分数为15%时, ZrB2-HfN陶瓷材料的断裂模式为穿晶断裂与沿晶断裂共存; 当HfN含量为10%时, ZrB2-HfN陶瓷材料具有较好的综合力学性能, 其硬度、抗弯强度和断裂韧度分别为: (16.47±0.24) GPa、(734.48±25) MPa和(5.37±0.20) MPa·m 1/2。
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| 关 键 词： | 陶瓷材料 微观组织 力学性能 真空热压烧结 |
| 收稿时间： | 2018-11-12 |
Effects of HfN content on microstructure and mechanical properties of ZrB2-HfN ceramic materials |
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| Affiliation: | 1.College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China2.Shanxi Key Laboratory of Procision Machining, Taiyuan University of Technology, Taiyuan 030024, China |
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| Abstract: | ZrB2 -HfN ceramic materials were fabricated by the vacuum hot-pressing sintering, and the influence of HfN content by mass on the microstructure and mechanical properties of the ZrB2 -HfN ceramic materials was studied. The results show that, with the HfN content by mass increasing from 5% to 15%, the Vickers hardness and flexural strength of the ZrB2 -HfN ceramic materials first increase and then decrease, while the fracture toughness increase gradually. When the content of HfN is 15%, the fracture mode ofZrB2 -HfN ceramic material is the coexistence of transgranular fracture and intergranular fracture. When the content of HfN is 10%, the ZrB2 -HfN ceramic material obtains the better mechanical properties, and the hardness, flexural strength, and fracture toughness are(16.47±0.24) GPa, (734.48±25) MPa, and (5.37±0.20) MPa·m 1/2, respectively. |
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