采用固定床化学气相法在800℃碳化纳米α-W粉体制备成功晶粒尺寸为15 nm左右的纳米WC粉体.用XRD分析测量了不同退火温度下纳米WC的晶粒尺寸.结果表明,随着退火温度升高,纳米WC粉体的晶粒尺寸随之增大,从原始晶粒尺寸15 nm长大到1 500℃时的47 nm.同时在不同升温速率下测量纳米WC粉体的DSC曲线,并由Kissinger方程求得其晶粒长大激活能为3.494 ev.
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