本文關鍵詞： Cu-V-Cr合金 微觀組織 氫傳輸性能 雙相結構 抗氫脆　出處：《材料科學與工藝》2017年01期 　論文類型：期刊論文

【摘要】：氫分離金屬膜是目前備受關注的一種用于氫氣提純的功能材料.為了獲得綜合性能優(yōu)異且價格低廉的氫分離金屬膜,本文借鑒"多相構成、功能分擔"的設計理念,通過非自耗電弧熔煉爐制備合金,采用XRD、掃描電子顯微鏡等手段研究合金相組成及微觀組織,采用課題組自主設計的儀器設備在不同溫度和壓力下進行氫溶解和氫滲透實驗,開發(fā)了具有雙相結構的新型Cu-V-Cr氫分離合金.結果發(fā)現:該合金微觀組織中的bcc-(V)固溶體相起滲氫作用,是氫的主要擴散通道;而組織中的fcc-(Cu)固溶體相起提高塑性作用.合金化元素Cr主要固溶在bcc-(V)中,顯著降低合金的氫溶解能力,大幅度提高抗氫脆性能,但同時也降低合金的氫擴散系數和滲氫性能.實驗表明,具有雙相結構的Cu-V-Cr氫分離合金有望達到氫溶解、擴散和滲透性能的良好匹配,從而同時實現優(yōu)異的氫滲透性能與抗氫脆性能.
[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.
【作者單位】： 哈爾濱理工大學材料科學與工程學院;哈爾濱工業(yè)大學材料科學與工程學院;
【基金】：國家自然科學基金資助項目(51274077;51271068;51425402)
【分類號】：TB34;TQ116.2

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