Surface Oxidation Behaviour of Cubic BN Powders

Xin Yan Yue; Yue Zhang; Jian Jun Wang; Wei Wang; Hong Qiang Ru

doi:10.4028/www.scientific.net/KEM.602-603.544

Paper Titles

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Preparation of ¹⁰B Enriched B₄C Ceramics by Pressureless Sintering
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Surface Oxidation Behaviour of Cubic BN Powders
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Fabrication and Ablation Behavior of Plasma Sprayed ZrC-W Composite Coatings
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Surface Oxidation Behaviour of Cubic BN Powders

Surface Oxidation Behaviour of Cubic BN Powders

Abstract:

In order to improve the sinterability of the cBN, surface oxidation treatment was conducted to form a B₂O₃ film on the surface of the cBN powders. The cBN powders (d₅₀ = 7.5 μm) were used as original powders. The heat treatment processes were 500, 800, 900, 950, 980 and 1000 °C holding for 30 minutes, respectively. The oxidation reactions which probably happened were calculated based on the thermodynamics. The experimental results showed that the oxidation starting temperature of cBN powders was higher than 800 °C. The higher the oxidation temperature, the greater the mass gain of the cBN powders.

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Key Engineering Materials (Volumes 602-603)

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544-547

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https://doi.org/10.4028/www.scientific.net/KEM.602-603.544

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Online since:

March 2014

Authors:

Xin Yan Yue*, Yue Zhang, Jian Jun Wang, Wei Wang, Hong Qiang Ru

Keywords:

cBN Powders, Microstructure, Oxidation, Thermodynamic

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