| 高纯致密Ti_2AlN陶瓷的合成及其高温行为 |
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| 引用本文： | 严明,陈艳林,常鹰,蒋久信. 高纯致密Ti_2AlN陶瓷的合成及其高温行为[J]. 材料导报, 2012, 26(8): 102-104,113 |
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| 作者姓名： | 严明 陈艳林 常鹰 蒋久信 |
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| 作者单位： | 湖北工业大学化学与环境工程学院,武汉,430068 |
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| 基金项目： | 武汉市青年科技晨光计划(201150431192);湖北工业大学博士启动基金(32700203) |
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| 摘 要： | 以Ti、Al和TiN粉按化学计量比配料,在原位热压(HP)烧结工艺条件下合成高纯致密Ti2AlN陶瓷材料。通过X射线衍射(XRD)分析烧结产物的相形成过程,用扫描电镜(SEM)和电子探针(EPMA)结合能谱仪(EDS)研究材料的显微结构特征。原位热压工艺合成Ti2AlN的最佳温度为1300℃,烧结试样的密度为4.22g/cm3,达到理论密度的97.9%,晶体发育完全,结构紧密,具有明显的层状结构。用高温显微镜研究了单相Ti2AlN的高温行为,1300～1500℃是坯体的烧结过程,1500～1580℃是Ti2AlN材料的软化温度,熔融温度高于1700℃。
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| 关 键 词： | TiAlN 合成 原位热压 高温行为 |
Synthesis of High-purity Dense Ti2AlN Ceramic and Its High Temperature Performance |
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| YAN Ming , CHEN Yanlin , CHANG Ying , JIANG Jiuxin. Synthesis of High-purity Dense Ti2AlN Ceramic and Its High Temperature Performance[J]. Materials Review, 2012, 26(8): 102-104,113 |
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| Authors: | YAN Ming CHEN Yanlin CHANG Ying JIANG Jiuxin |
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| Affiliation: | (College of Chemistry and Environmental Engineering,Hubei University of Technology,Wuhan 430068) |
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| Abstract: | High-purity Ti2AlN ceramic was prepared by in-situ hot pressing(HP) of Ti/Al/TiN powders in stoichiometric proportion.X-ray diffraction(XRD) was used to analyze the phase formation.Scanning electron microscopy(SEM) and electron probe micro-analysis(EPMA) coupled with energy-dispersive spectroscopy(EDS) were utilized to investigate the morphology characteristics.The density of Ti2AlN prepared at the optimal synthetic temperature 1300℃ by HP was measured to be 4.22g/cm3,which reached 97.9% of its theory densities.Ti2AlN phase was well-developed with close and lamellated structure.The high temperature performance of Ti2AlN was investigated by high temperature microscope.The sintering process was at the range of 1300~1500℃.The softening temperature of Ti2AlN was at the range of 1500~1580℃ and its melting temperature was higher than 1700℃. |
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| Keywords: | Ti2AlN synthesis in-situ hot pressing high temperature performance |
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