刘莎莎,练友运,封范,王建豹,陈哲,谭扬,刘翔

• 1:核工业西南物理研究院

摘要(Abstract)：

在高纯W粉中添加不同含量的HfH_2粉末,通过放电等离子烧结(SPS)将合金粉末制备成直径15 mm的W-(0、0.1 mass%、0.3 mass%、0.5 mass%、0.6 mass%、1.0 mass%)Hf合金样品,分析了Hf含量对烧结样品的微观组织、密度和维氏硬度的影响,并对烧结样品的耐热冲击性能进行了测试。结果表明:纯W在0.22 GW/m~2的热负荷下即生成裂纹网,掺杂少量Hf(≤0.3 mass%)时引起W-Hf合金的硬度下降,Hf掺杂量在0.5 mass%及以上时有强化作用;Hf元素的加入可以明显改善纯钨的耐热冲击性能,Hf含量高于0.3 mass%时,W-Hf合金的裂纹阈值提高到了0.22～0.33 GW/m~2,且在Hf含量为0.6 mass%时,在0.44 GW/m~2的热负荷下W-Hf合金也只生成了少量的微裂纹。

关键词(KeyWords)： 钨-铪;放电等离子烧结;耐热冲击

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(11605044)

作者(Author): 刘莎莎,练友运,封范,王建豹,陈哲,谭扬,刘翔

DOI: 10.13289/j.issn.1009-6264.2019-0361

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