化学气相沉积钨的组织与力学性能研究Microstructure and mechanical properties of CVD tungsten
侯岳翔;李树奎;孙红婵;鲁旭东;宋修纲;
摘要(Abstract):
用扫描电镜上的EBSD装置研究化学气相沉积法制备的高纯钨的晶体取向,化学气相沉积钨具有{110}〈001〉取向织构;用电子万能试验机和分离式霍普金森杆(SHPB)研究纯钨的准静态(10-3s-1)和动态(2000~5000s-1)压缩力学性能,并与等轴晶重熔钨进行对比分析,沉积钨的屈服强度由静态时的1350MPa上升到动态时的2000MPa以上,是应变率敏感材料,等轴晶纯钨的静动态屈服强度高于柱状晶沉积纯钨,柱状晶沉积纯钨有明显的应变硬化效应。沉积钨柱状晶组织的塑性变形方式除滑移外,还有大量的孪晶产生。
关键词(KeyWords): 化学气相沉积;应变率效应;力学性能;高纯钨;变形机制
基金项目(Foundation):
作者(Author): 侯岳翔;李树奎;孙红婵;鲁旭东;宋修纲;
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DOI:
参考文献(References):
- [1]韩欢庆,陈飞雄,甘乐.钨在药型罩中的应用[J].中国钨业,2004,19(1):26-28.
- [2]马捷,张好东,毕安园.化学气相沉积法制取异型钨制品研究[J].兵工学报,2006,27(2):315-319.
- [3]Dummer T,Lasalvia J C,Ravichandaran G.Effect of strain rate on plastic flow and failure in polycrystalline tungsten[J].Acta Metall,1998,46:6267-6290.
- [4]Wei Q,Jiao T.Mechanical behavior and dynamic failure of high-strength ultrafine grained tungsten under uniaxial compression[J].Acta Materialia,2006,54:77-87.
- [5]Pappu S,Sen S.Deformation twins in oriented,columnargrain-ed tungsten rod ballistic penetrators[J].Materials Science and Engineering,2001,A298:144-157.
- [6]Argon A S,Maloof S R.Plastic deformation of tungsten single crystals at low temperatures[J].Acta Metall,1966,14:1449-1462.