| 烧结保温时间对40Mo-ZrO2和40Mo-8YSZ金属陶瓷导电性能的影响 |
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| 引用本文： | 李建朝,齐素慈,唐磊.烧结保温时间对40Mo-ZrO2和40Mo-8YSZ金属陶瓷导电性能的影响[J].矿冶工程,2021,41(2):121-124. |
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| 作者姓名： | 李建朝 齐素慈 唐磊 |
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| 作者单位： | 1.河北工业职业技术学院 材料工程系,河北 石家庄 050091;
2.上海大学 省部共建高品质特殊钢冶金与制备国家重点实验室,上海 200072 |
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| 基金项目： | 河北省高等学校科学研究计划青年基金(QN2020161);
河北工业职业技术学院自然科学项目(ZRY2017001) |
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| 摘 要： | 以金属钼粉、氧化锆粉和稳定氧化钇锆粉作为原料，采用粉末冶金方法制备了40Mo-ZrO2和40Mo-8YSZ金属陶瓷试样，采用四电极法对试样的高温电导率进行了测量，研究了烧结保温时间对金属陶瓷孔隙率和导电性能的影响。结果表明: 延长烧结保温时间，颗粒出现片状集聚现象，烧结体更加致密，气孔率下降，金属陶瓷电导率提高。40Mo-ZrO2金属陶瓷的电导率受金属相电子导电与陶瓷相离子导电的混合导电机制影响，其电导率分别在850 ℃和1200 ℃附近出现峰值。40Mo-8YSZ金属陶瓷电导率随温度升高而降低，主要受金属相电子导电机制影响。
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| 关 键 词： | Mo-ZrO2 金属陶瓷 氧化锆 烧结 微观结构 电导率 孔隙率 |
| 收稿时间： | 2020-11-23 |
Effect of Holding Time in Sintering on Electrical Conductivity of 40Mo-ZrO2 and 40Mo-8YSZ Cermet |
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| LI Jian-chao,QI Su-ci,TANG Lei.Effect of Holding Time in Sintering on Electrical Conductivity of 40Mo-ZrO2 and 40Mo-8YSZ Cermet[J].Mining and Metallurgical Engineering,2021,41(2):121-124. |
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| Authors: | LI Jian-chao QI Su-ci TANG Lei |
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| Affiliation: | 1.Department of Materials Engineering, Hebei College of Industry and Technology, Shijiazhuang 050091, Hebei, China;
2.State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China |
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| Abstract: | With Mo powder, ZrO2 powder and stabilized powdered yttria oxide and powdered zirconia as raw materials, 40Mo-ZrO2 and 40Mo-8YSZ cermet samples were prepared by using powder metallurgy process. Electrical conductivity of the sample was measured using four-electrode method, and the effect of holding time in sintering on the electrical conductivity and porosity of the samples were investigated. Results showed that by prolonging holding time, the flake agglomeration occurred between particles, and the sintered product had higher density and lower porosity, while the electrical conductivity of the cermet was increased. The electrical conductivity of 40Mo-ZrO2 cermet was influenced by a combined conductivity of metal phase and ceramic phase, and reached the peak at around 850 ℃ and 1200 ℃, respectively. The electrical conductivity of 40Mo-8YSZ cermet decreased with the rise of temperature, which was mainly attributed to the electrical conductivity mechanism of metal phase. |
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| Keywords: | Mo-ZrO2 cermet ZrO2 sintering microstructure electrical properties porosity |
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