(1. 濟(jì)南大學(xué) 化學(xué)化工學(xué)院，濟(jì)南 250022;
2. 中國科學(xué)院 上海微系統(tǒng)與信息技術(shù)研究所 能源室，上海 200050)
摘 要: 采用XRD、 SEM和PCT法研究Mo取代TiCr1.8合金中的部分Cr對其結(jié)構(gòu)和儲氫性能的影響。 XRD測試結(jié)果表明， 隨著合金中Mo取代Cr的量的增加， 合金的相組成首先轉(zhuǎn)變?yōu)镸oCr體心立方(BCC)相與Laves相共存， Laves相的含量逐漸降低； 當(dāng)Mo含量超過一定量時(shí)， 合金的相組成轉(zhuǎn)變?yōu)镸oCr BCC相與微量的α-Ti相共存； MoCr BCC相的晶胞參數(shù)隨合金中Mo含量的增加而增大。 合金的壓力-組分-溫度(PCT)測試結(jié)果表明， 合金的吸氫量隨合金中Mo含量的增加而減少。
關(guān)鍵字: TiCr基儲氫合金； 壓力-溫度-組成測試; 儲氫性能
（1. School of Chemistry and Chemical Engineering, Ji'nan University,
Ji'nan 250022, China;
2. Department of Energy Science and Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China）
Abstract: The influences of partial substitution of Mo for Cr of TiCr1.8 alloys on structure and hydrogen storage characteristics were investigated by means of XRD, SEM and PCT. X-ray diffraction (XRD) tests show that MoCr body centered cubic (BCC) phase and Laves phase coexist in the alloys despite the decrease of Laves phase content. And there exist MoCr BCC phase and α-Ti phase in the alloys when Mo content surpasses certain value. The crystal cell parameters of MoCr BCC phase increase with increasing Mo content. Pressure-composition-temperature (PCT) tests reveals that the hydrogen absorption content decreases with increasing Mo content.
Key words: TiCr-based hydrogen storage alloys; pressure-composition- temperature (PCT); hydrogen storage performances
