CAJ | 학술논문

研究了Al对TiV0.8-xCr1.2Alx(x=0、0.05、0.1、0.15、0.2)合金的结构与贮氢性能的影响.XRD、PCT等测试研究表明:TiV0.8-xCr1.2Alx合金均为单相bcc结构,铸态时主相为树枝状晶组织;随着Al含量由0增加到6.67 at%,合金的晶格常数变大,吸氢量和放氢量减小,氢化物标准生成焓变与生成熵变增大.放氢的平台压随着Al含量的增加而线性增大.TiV0.75Cr1.2Al0.05合金最大吸氢量达3.887%(质量分数),有效吸氢量达2.288%.
연구료Al대TiV0.8-xCr1.2Alx(x=0、0.05、0.1、0.15、0.2)합금적결구여저경성능적영향.XRD、PCT등측시연구표명:TiV0.8-xCr1.2Alx합금균위단상bcc결구,주태시주상위수지상정조직;수착Al함량유0증가도6.67 at%,합금적정격상수변대,흡경량화방경량감소,경화물표준생성함변여생성적변증대.방경적평태압수착Al함량적증가이선성증대.TiV0.75Cr1.2Al0.05합금최대흡경량체3.887%(질량분수),유효흡경량체2.288%.
The effect of Al on the structures and hydrogen storage properties of TiV0.8-xCr1.2Alx (x=0,0.05,0.1,0.1 5,0.2) alloys was investigated in this paper. Adopting XRD and PCT measurements etc, we have found that all alloys tested possess single Phase with bcc structure and dendrite crystals in as-casting. With increasing of Al from 0 to 6.67 at%, the alloy lattice parameters increase, the hydrogen absorption and desorption capacities decrease, and forming enthalpy and entropy enhance. The desorption plateau pressures increase with increasing of Al content and temperature. The maximum hydrogen capacity is 3.887wt%, and the effective hydrogen capacity is 2.288wt% for TiV0.75Cr1.2Al0.05 alloy.