Mn、 Ti/Cr 比與熱處理對 Ti-V-Cr 儲氫合金結構與特性之影響

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吳育丞(Yu-Cheng Wu) 查詢紙本館藏

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能源工程研究所

論文名稱

Mn、 Ti/Cr 比與熱處理對 Ti-V-Cr 儲氫合金結構與特性之影響
(Effect of Mn addition﹐Ti/Cr ratio and heat treatment on structural and hydrogen storage characteristics of Ti-V-Cr alloys)

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摘要(中)

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。

摘要(英)

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.

關鍵字(中)

★ Ti-V-Cr-Mn 合金
★ 熱處理
★ 儲氫合金
★ BCC 相

關鍵字(英)

★ Annealing treatment
★ Ti-V-Cr-Mn alloys
★ BCC phase
★ Hydrogen storage alloys

論文目次

目錄......................................................I
圖目錄..................................................III
表目錄....................................................V
第一章前言..............................................1
第二章文獻回顧..........................................2
2.1 儲氫合金儲放氫基本原理...........................2
2.2 儲氫合金發展簡介.................................4
2.2.1 儲氫合金種類介紹..........................4
2.2.2 BCC 固溶體儲氫合金........................6
2.3 儲氫合金活化性能的改善..........................12
2.3.1 改變合金的表面性質.......................12
2.3.2 改變合金的基地性質.......................13
2.4 研究背景與目的..................................14
第三章研究方法及進行步驟...............................15
3.1 實驗流程........................................15
3.2 儲氫合金之製備..................................16
3.3 微結構分析......................................18
3.3.1 X 光繞射分析.............................18
3.3.2 電子微探儀分析...........................18
3.3.3 微差掃描熱分析...........................18
3.4 熱處理..........................................19
3.5 儲氫合金之儲放氫基本特性測試....................19
3.5.1 活化速率測試.............................19
3.5.2 儲放氫測試...............................20
第四章結果與討論.......................................22
4.1 Ti33V33Cr34 合金之結構與吸放氫性能.................22
4.2 Mn 添加對 Ti33V33Cr(34-x)Mnx 合金吸放氫性能之影響.....27
4.3 Ti/Cr 比對 Ti(33-y)V33Cr(19+y)Mn15 合金吸放氫性能之影響.35
4.4 熱處理對 Ti31V33Cr21Mn15 合金 PCI 平台斜率之影響....39
第五章結論.............................................42
第六章未來研究方向.....................................43
參考文獻.................................................44
附錄.....................................................48

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指導教授

李勝隆(Sheng-Long Lee)

審核日期

2007-7-17

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