Analysis of special morphology of gas ablation of tungsten-infiltrated copper material
In response to the application requirements of tungsten-impregnated copper material in high-tempera-ture gas erosion,the tungsten-infiltrated copper material(W-7Cu)experienced high-temperature gas erosion was analyzed.The focus was on the morphological features of the similar nut-shaped that appeared on the surface of W-7Cu after burning.The microstructure was observed by SEM and metallographic analysis.The loss of copper was estimated through energy spectrum.The phase structure changes was analyzed by XRD.The results show that Cu loss occurres in everywhere of the materials,and C is presented on both the outer and inner surfaces.Both of the inner and outer surfaces contain a large amount of W6C2.54 and WC phases.Under high temperature and high-speed particle flow,the C particles enters the W skeleton formed after Cu precipitating and reacts with W to form new low-melting phases,which induces the ablation accelerating.
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