발간논문

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Vol.38, No.1, 112 ~ 118, 2000
Title
Pesearch Paper / Powder Matallurgy : Thermodynamical Study to Synthesize Al2O3-WC Composite Powder by SHS Process
장결Jie Zhang,이종현Jong Hyeon Lee,조영웅Young Woong Cho,원창환Chang Whan Won
Abstract
Al₂O₃-WC composite powders were synthesized by Self propagating High-temperature Synthesis (SHS) using Al powders as reducing agent. WC, W₂C, and Al₂O₃ were concurrently formed in WO₃-Al-C system. Thermodynamical data for the system was applied to study on the phase selection. It was found that the complete reaction was achieved with excessive addition of carbon and appropriate processing parameters such as degree of dilution, particle size of aluminum, pellet compaction pressure and amount of carbon source. The final product which was leached by 10% 1 : 4 HNO₃+ HF diluted solution consisted of Al₂O₃-55 wt%WC having 2∼3 ㎛ of mean particle size.
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