| 烧结工艺对NiFe2O4-10NiO双相陶瓷烧结行为及微观结构的影响 |
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| 引用本文： | 时凯华,张雷,李志友,周科朝.烧结工艺对NiFe2O4-10NiO双相陶瓷烧结行为及微观结构的影响[J].粉末冶金材料科学与工程,2011,16(5):723-729. |
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| 作者姓名： | 时凯华 张雷 李志友 周科朝 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)资助项目，国家高技术研究发展计划(863计划)资助项目，国家自然科学基金创新团队项目 |
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| 摘 要： | 采用粉末冶金法制备NiFe2O4-10NiO双相陶瓷,对该陶瓷在不同烧结气氛、不同烧结温度和保温时间等条件下的烧结行为进行研究,探讨烧结气氛、烧结温度和保温时间等对NiFe2O4-10NiO双相陶瓷烧结致密化进程及显微结构演变规律的影响.结果表明:N2气氛下NiFe2O4-10NiO双相陶瓷的致密化速率及晶粒长大速率均...
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| 关 键 词： | NiFe2O4-10NiO双相陶瓷 烧结 密度 晶粒尺寸 析出相 |
Effect of sintering process on densification procedure and microstructures of NiFe2O4-10NiO dual-phase ceramic |
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| SHI Kai-hua,ZHANG Lei,LI Zhi-you,ZHOU Ke-chao.Effect of sintering process on densification procedure and microstructures of NiFe2O4-10NiO dual-phase ceramic[J].materials science and engineering of powder metallurgy,2011,16(5):723-729. |
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| Authors: | SHI Kai-hua ZHANG Lei LI Zhi-you ZHOU Ke-chao |
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| Affiliation: | (State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China) |
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| Abstract: | NiFe2O4-10NiO dual-phase ceramic was prepared by traditional powder metallurgy method and sintered in different atmosphere,temperature and time.The influences of sintering conditions on densification procedure and microstructure were studied.The results show that the densification rate and coarsening velocity of grains of NiFe2O4-10NiO dual-phase ceramic sintered in N2 are higher than that in air.When the sintering temperature is 1 300 ℃,the densification rate and coarsening velocity of grains in N2 are 1.1 and 23.8 times of that in air respectively.When sintering process is 1 300 ℃/120 min,the density and grain size of the samples sintered in N2 are 36.1% and 426.5% higher than that of in air atmosphere,respectively.Moreover,the Ni-Fe and spinell phases only separate out from NiFe2O4-10NiO when singtering in N2,it is considered that the forming process is due to dissociation of Fe2O3 and NiO,as well as diffuse type solid-state phase changes between them. |
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| Keywords: | NiFe2O4-10NiO dual-phase ceramic sintering density grain size precipitated phase |
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