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无机材料学报

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放电等离子超快速烧结氧化物陶瓷

高濂; 洪金生; 宫本大树+; DIAZDELATORRESebastian+   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室; 上海200050; +日本大阪府立产业技术综合研究所; 大阪590-02 日本
  • 收稿日期:1997-09-26 修回日期:1997-10-10 出版日期:1998-02-20 网络出版日期:1998-02-20

Superfast Densification of Oxide Ceramics by Spark Plasma Sintering

GAO Lian; HONG Jin-Sheng; MIYAMOTO Hiroki+; DIAZDELATORRESebastian+   

  1. State Key Lab on High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China; +Technology Research Institute of Osaka Prefecture Osaka 590-02 Japan
  • Received:1997-09-26 Revised:1997-10-10 Published:1998-02-20 Online:1998-02-20

PDF (PC)

1082

被引次数

74

摘要： 本文介绍一种氧化物陶瓷超快速烧结的新方法．用放电等离子烧结的方法对Al2O3、Y-TZP、YAG、Al2O3-ZrO22和莫来石等各种氧化物粉体进行了超快速烧结，采用2～3min升温到1200℃以上，不保温或保温2min，然后迅即在3min之内冷却至600℃以下的烧结温度，得到了直径为20mm的晶粒细、致密度高、力学性能好的烧结样品．对用化学共沉淀法自制的20mol％Al2O3-ZrO2（3Y）纳米粉体分别在1170～1500℃之间的7个不同温度下进行放电等离子烧结，升温速率为200℃／min，保温2min后；迅即在3min之内强制冷却至600℃以下．1350℃以上烧结得到的样品密度已接近理论密度，1250℃以上烧结得到的样品的断裂韧性K1c都大于6MPa·m1/2放电等离子超快速反应烧结所得到的ZrO2-莫来石复相陶瓷致密度高、力学性能好，ZrO2晶粒在莫来石基体中分布均匀,XRD结果表明，在1530℃烧结的样品中，已找不到ZrsiO4痕迹，说明在如此快速的烧结条件下；反应烧结已经可以完成．

关键词: 氧化物陶瓷, 放电, 等离子, 超快速烧结

Abstract:

The SPS (Spark Plasma Sintering) process is a new materials synthesis processing technology recently developed by Sumitomo Coal Mining Co.Ltd.,
Japan. Some oxides such as Al2O3, Y-TZP, YAG, Al2O3-ZrO2 and Mullite were successfully superfast densified by SPS under the conditions
of heating rate as high as 600℃/min, no keeping time at the sintering temperatures above 1200℃, and then fast cooling to 600℃
within 3 minutes. The superfast sintering samples show high densities, fine microstructures and excellent mechanical properties. The fracture toughness K1c
of 20mol% Al2O3-ZrO2(3Y) samples sintered by SPS at >1250℃ for 2 min is higher than 6MPa·m1/2. The reaction sintering of ZrO2-
mullite could be completed by SPS at 1530℃ for 3 min.The SPS (Spark Plasma Sintering) process is a new materials synthesis processing technology recently developed by Sumitomo Coal Mining Co.Ltd.,
Japan. Some oxides such as Al_2O_3, Y-TZP, YAG, Al_2O_3-ZrO_2 and Mullite were successfully superfast densified by SPS under the conditions
of heating rate as high as 600℃/min, no keeping time at the sintering temperatures above 1200℃, and then fast cooling to 600℃
within 3 minutes. The superfast sintering samples show high densities, fine microstructures and excellent mechanical properties. The fracture toughness K1c
of 20mol% Al2O3-ZrO2(3Y) samples sintered by SPS at >1250℃ for 2 min is higher than 6MPa·m1/2. The reaction sintering of ZrO2-
mullite could be completed by SPS at 1530℃ for 3 min.

Key words: superfast densification, spark plasma sintering, oxide ceramicssuperfast densification, spark plasma sintering, oxide ceramics

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