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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

纳米AlN/BN复相陶瓷的显微结构与性能

金海云, 王雯, 高积强, 乔冠军, 金志浩   

  1. 西安交通大学材料强度国家重点实验室, 西安 710049
  • 收稿日期:2005-01-10 修回日期:2005-04-01 出版日期:2006-01-20 网络出版日期:2006-01-20

Micro-structure and Properties of Machinable AlN-BN Ceramic Nano-composites

JIN Hai-Yun, WANG Wen, GAO Ji-Qiang, QIAO Guan-Jun, JIN Zhi-Hao   

  1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2005-01-10 Revised:2005-04-01 Published:2006-01-20 Online:2006-01-20

PDF (PC)

1057

被引次数

5

摘要： 采用尿素与硼酸的反应, 在850℃氮气氛下, 合成了纳米BN?包裹的AlN粉料, 通过TEM观察, BN粒径为20～30nm. 通过热压烧结制备出纳米h-BN包裹的AlN/BN
复相陶瓷, SEM/TEM观察, h-BN呈细针状, 针长100～400nm, 针宽为30～50nm. 当h-BN含量≥20wt%时, 其硬度显著降低, 提高了材料的可加工性能.

关键词: 可加工, AlN, 纳米BN, 显微结构

Abstract: The AlN/h-BN nanocomposite powders were prepared through the reaction of AlN powder, H3BO3, and CO(NH2)2 in nitrogen atmosphere at
850℃. TEM observation shows that the average particle diameter of BN is about 20～30nm. The AlN/BN ceramic composites were synthesized
by hot-pressing. SEM/TEM observation shows that the BN particles are thin pin-shaped with 100～400nm pin-length and 30～50nm pin-width. The
hardness of the composites decreases obviously and the machinable property increases when the BN content is more than 20wt%.

Key words: machinabe, AlN, nano-sized BN, microstructure

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