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无机材料学报

无机材料学报

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Al与cBN在高温高压下的相互作用

赵玉成, 王明智   

  1. 亚稳材料制备技术与科学国家重点实验室, 燕山大学材料科学与工程学院, 秦皇岛 066004
  • 收稿日期:2007-04-12 修回日期:2007-05-27 出版日期:2008-03-20 网络出版日期:2008-03-20

Interaction of Al and cBN under High Temperature and High Pressure

ZHAO Yu-Cheng, WANG Ming-Zhi   

  1. State Key Laboratory of Metastable Materials Science and Technology,
    College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
  • Received:2007-04-12 Revised:2007-05-27 Published:2008-03-20 Online:2008-03-20

PDF (PC)

1969

被引次数

34 | 8

摘要： 将立方氮化硼(cBN)微粉和铝(Al)微粉按照体积比7:3的比例进行混配, 在高温(1300～1500℃)、高压(5.5GPa)条件下进行烧结. 利用X射线衍射分析(XRD)、透射电子显微镜(TEM)以及X射线色散能谱(EDS)对烧结体的物相构成、显微结构以及各组分元素的分布进行了分析. 实验结果表明, 1300℃, Al尚未与cBN反应; 当温度升至1400℃时, Al与cBN反应生成AlN和AlB2; 温度进一步升高至1500℃, 反应产物增多, 产物种类不变. TEM和EDS分析表明, 在反应过程中Al扩散进入cBN的表层, B扩散进入富Al的区域, 生成新相AlN和AlB2.

关键词: 立方氮化硼, 烧结, 高温高压, 相互作用

Abstract: Polycrystalline cubic boron nitride (PcBN) samples were obtained by sintering cBN and aluminum micro-powders in volume ratio of 7:3 at high temperature (1300--1500℃) and high pressure (5.5GPa). The identification and the morphology of phases, and the distribution of elements in PcBN samples were studied by using X-ray diffraction (XRD), transmission electron microscope (TEM), selected-area electron diffraction (SAED), and energy dispersive X-ray spectrometry (EDS). Results show that Al does not react with cBN at 1300℃. When the temperature is increased to 1400℃, Al can react with cBN to form AlN and AlB2, and the temperature is increased to 1500℃, the amount of products increases. TEM and EDS analyzing results indicate that Al atoms diffuse into surface layer of cBN particle, and B atoms diffuse into Al zone, forming new phases AlN and AlB2.

Key words: cBN, sinter, high temperature and high pressure, interaction

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