材料科学与工艺, 2017, 25(1): 56-61.
10.11951/j.issn.1005-0299.20160318
氢分离金属膜是目前备受关注的一种用于氢气提纯的功能材料。为了获得综合性能优异且价格低廉的氢分离金属膜，本文借鉴“多相构成、功能分担”的设计理念，通过非自耗电弧熔炼炉制备合金，采用XRD、扫描电子显微镜等手段研究合金相组成及微观组织，采用课题组自主设计的仪器设备在不同温度和压力下进行氢溶解和氢渗透实验，开发了具有双相结构的新型Cu－V－Cr氢分离合金。结果发现：该合金微观组织中的bcc－（ V）固溶体相起渗氢作用，是氢的主要扩散通道；而组织中的fcc－（ Cu）固溶体相起提高塑性作用。合金化元素Cr主要固溶在bcc－（ V）中，显著降低合金的氢溶解能力，大幅度提高抗氢脆性能，但同时也降低合金的氢扩散系数和渗氢性能。实验表明，具有双相结构的Cu－V－Cr氢分离合金有望达到氢溶解、扩散和渗透性能的良好匹配，从而同时实现优异的氢渗透性能与抗氢脆性能。
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