摘要
本文采用不同粒度的超细钨粉 (费氏粒度 :0 38、0 41、0 43、0 80、3 6 0、4 5 0、4 5 0 μm)与多种不同粒度的碳黑粉 (费氏粒度 :0 1、0 3、0 5、0 8、4 3、5 3μm)混合 ,在常规碳化工艺 (W +C =WC)条件下 ,( 830～ 1 5 6 0℃ )较宽碳化温度区间内 ,研究了钨粉粒度、碳黑粉粒度对所制备的WC粉的化合碳含量、粒度的影响。在试验中通过化学分析法 ,XRD分析测定WC粉的化合碳、游离碳含量及产物的物相组成 ,并用BET和费氏法测量WC粉的粒度。结果表明 :当采用超细碳黑 (粒度≤ 0 1 μm)时 ,随着W粉粒度变粗 (费氏粒度 0 38～ 4 5 μm)所得WC粉粒度由 0 5 7μm增大到 4 75 μm。碳黑粉粒度对WC粉粒度没有明显影响 ,但碳黑粉粒度对碳化温度、WC粉的化合碳含量、物相组成 。
Ultrafine W and carbon black of various sizes(Fisher sizes W:0 38,0 41,0 43,0 80,3 60,4 50μm,C:0 1,0 3,0 5,0 8,4 3,5 3μm)were mixed according to the traditional equation W+C=WC and reacted at various temperatures from 830℃ to 1560℃ The influence of grain sizes of W and carbon black powders on the compound carbon content,the free carbon content and the phase composition of the reacted products were analyzed with chemical analysis method and XRD And the grain size was measured with BET and Fisher method respectively The experiment results indicated that the size of the carbonized WC particles increased from 0 57μm to 4 75μm with the coarsening of W particles (Fisher 0 38～4 5μm)when ultrafine carbon black powders(≤0 1μm)were used The particle size of the carbon powders had no significant influence on the WC particle size But it had significant influences on the comprehensive qualities of the WC powders,such as carbonization temperature,compound carbon content in WC particle and phase compositions
出处
《粉末冶金工业》
CAS
2001年第2期22-25,共4页
Powder Metallurgy Industry
基金
自然科学基金项目! 5 0 0 740 0 7
