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

Abstract

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

CLC Number:

TQ174

JIN Hai-Yun,WANG Wen,GAO Ji-Qiang,QIAO Guan-Jun,JIN Zhi-Hao. Micro-structure and Properties of Machinable AlN-BN Ceramic Nano-composites[J]. Journal of Inorganic Materials.

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

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