Cr对Cu-V氢分离合金组织与氢传输性能的影响

发布时间：2018-02-25 21:05

本文关键词： Cu-V-Cr合金微观组织氢传输性能双相结构抗氢脆　出处：《材料科学与工艺》2017年01期 　论文类型：期刊论文

【摘要】：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.
[Abstract]:Hydrogen separation metal membrane is a kind of functional material used for hydrogen purification. In order to obtain hydrogen separation metal membrane with excellent comprehensive performance and low cost, this paper draws lessons from the design idea of "multiphase composition, function sharing". The alloy was prepared by non-consumable arc smelting furnace. The phase composition and microstructure of the alloy were studied by means of XRD and scanning electron microscope. The hydrogen dissolution and hydrogen permeation experiments were carried out at different temperatures and pressures with the instruments designed by the research group. A new type of Cu-V-Cr hydrogen separation alloy with dual phase structure was developed. The results show that the solid solution phase in the microstructure of the alloy plays an important role in hydrogen diffusion. However, the solid solution phase of fcc-cu in the microstructure plays an important role in improving the plasticity. The alloying element Cr is mainly dissolved in bcc-V), which significantly reduces the hydrogen solubility of the alloy and greatly improves its hydrogen embrittlement resistance. But at the same time, the hydrogen diffusion coefficient and hydrogen permeation properties of the alloy are also reduced. The experimental results show that the hydrogen separation alloy with two-phase structure is expected to achieve a good match of hydrogen dissolution, diffusion and permeability. Thus, the excellent hydrogen permeation performance and hydrogen embrittlement resistance are realized simultaneously.
【作者单位】：哈尔滨理工大学材料科学与工程学院;哈尔滨工业大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(51274077;51271068;51425402)
【分类号】：TB34;TQ116.2

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