本實驗將研究 Ti-V-Cr BCC 相儲氫合金的結構與吸放氫特性，藉由 Mn 元素的添加、改變 Ti/Cr 比與熱處理製程等方面探討，以期能了解各參數與吸放氫間關係。結果顯示鑄態 Ti33V33Cr34 合金有優良的活化速率，在第一次活化之初始 10 min 時，吸氫量即達最大吸氫量的 95 %。當 Mn 的添加不超過 15 at.% 時，有助於提昇鑄態 Ti33V33Cr(34-x)Mnx 合金放氫量，其 Ti33V33Cr19Mn15 合金最佳有效放氫量為 2.48 wt.%。降低鑄態 Ti(33-y)V33Cr(19+y)Mn15 合金中的 Ti/Cr 比可提高放氫平台壓，但也伴隨著最大吸氫量的減少。當 Ti31V33Cr21Mn15 合金在 1200 ℃ 下經 10 h 之熱處理，有效提高放氫平台壓並減少 PCI 平台斜率。

Effect of Mn addition, Ti/Cr ratio and heat treatment on structural and hydrogen storage characteristics of Ti-V-Cr alloys were investigated. It was found that the hydrogen absorption rate of Ti33V33Cr34 alloy was considerably fast and more than 95 % of the hydrogen was absorbed within 10 min. The hydrogen desorption capacity was improved when the Mn contained less than 15 at.%. The best effective hydrogen storage capacity of Ti33V33Cr19Mn15 alloy was 2.48 wt.%. The plateau pressure increased with Ti/Cr ratio decreasing for the Ti(33-y)V33Cr(19+y)Mn15 alloys, however, the maximum hydrogen storage capacity decreased. The Ti31V33Cr21Mn15 alloy increased the plateau pressure and decreased the plateau slope after annealing at 1200 ℃ for 10 h.

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