1992 Fiscal Year Annual Research Report

金属水素化物ヒートポンプ材用バナジウム基固溶合金の開発

Research Project

Project/Area Number	02650523
Research Institution	Nagasaki University
Principal Investigator	坂本芳一長崎大学, 工学部, 教授 (50026019)
Co-Investigator(Kenkyū-buntansha)	香川明男長崎大学, 工学部, 助教授 (00093401)
Keywords	水素 / 金属水素化物ヒートポンプ / バナジウム基固溶合金 / 水素化物の生成・解離
Research Abstract	V-Ti基合金,(V_1-_XTi_X)_1-_yX_y(X=Al,Si,Cr,Fe,Co,Ni,Zr)3元合金の水素化特性および水素吸蔵・放出サイクルの影響と耐微粉化性について調べ,それらの諸特性を総合的に評価してヒートポンプ材用合金としての適用を検討した。その結果は次のように要約される。 1)最大水素吸蔵量は合金の価電子濃度(e/a)に関係し,この値が約5を越えると急激に低下する。これより第3元素の許容添加量を予測することができる。しかしAl,Siを含む合金はこの関係から大きなずれを示すことから,このような予測は添加元素が遷移金属に限られる。 2)γ水素化物生成・解離時のプラトー圧はCr,Fe,Co,Ni.Al,Siの添加により増大しZrの添加は低下する。解離圧の対数と合金の格子定数との間にはAlを含む合金を除き,格子定数の減少と共にプラトー圧は増大することから,適当な第3元素の添加によりプラトー圧を制御することができる。 3)水素化特性に及ぼす第3元素の影響を総合的に評価した結果,諸特性を改善する,あるいは劣化させないという条件をすべて満たす元素はみられなかったが,CrとZrの添加が最適であった。 4)V-Ti基合金は水素化サイクルの極く初期に亀裂の発生が認められたが,100サイクル以上では顕著な微粉化の進行はなく,他のLaNi_5,FeTi合金などに比較して優れた耐微粉化性を示した。 5)冷間圧延を施した薄板状試片は粒状試片よりヒステリシスが小さく,特にV-5at.%Ti合金で優れていた。 6)ヒートポンプ用合金としてV-5at.%Ti合金とV-15at.%Ti-5at.%Zr合金を組み合わせた場合,室温25℃で,廃熱温度が150℃の時は-5℃の冷熱が得られ,サイクル当たり約97Kcal/kgの優れた冷凍性能が期待できる。

Research Products
(23 results)

All Other

All Publications (23 results)

[Publications] Y.Sakamoto: "Hydrogen Solubility in Palladium-Vanadium Alloys" Z.Phys.Chem.Neue Folge. 165. 67-81 (1989)
[Publications] Y.Sakamoto: "Absorption of Hydrogen by Palladium-Nickel Alloys" Z.Phys.Chem.Neue Folge. 162. 83-96 (1989)
[Publications] F.L.Chen: "X-Ray Investigation of the α/β Miscibility Gaps in Hydrogenated Palladium-Rare Earth Alloys" J.Less-Common Metals. 155. 173-184 (1989)
[Publications] 坂本,芳一: "金属水素化物ヒートポンプ材用バナジウム固溶合金の開発" 省エネルギー. 41. 9-12 (1989)
[Publications] Y.Sakamoto: "Absorption of Hydrogen by Pd-Nb(Ta) Solid Solution Alloys" J.Chem.Soc.,Faraday Trans.86. 377-385 (1990)
[Publications] Y.Sakamoto: "X-Ray Studies of the Absorption of Hydrogen by Pd-rich Pd-(Tb,Tm,Lu)Alloys" J.Less-Common Metals. 159. 191-198 (1990)
[Publications] Y.Sakamoto: "Thermodynamic Behaviour of Hydrogen in Palladium-Gadoli-nium Solid Solution Alloys" Ber.Bunsenges.Phys.Chem.94. 190-198 (1990)
[Publications] Y.Sakamoto: "The (α+β) Hydrogen Miscibility Gaps in Hydrogenated Palladium Rich Pd-Y(Gd)-Ag Ternary Alloys" J.Less-Common Metals. 166. 45-56 (1990)
[Publications] Y.Sakamoto: "Thermodynamic Studies of the Absorption of Hydrogen by Pd-Ti(Zr) Solid Solution Alloys" Ber.Bunsenges.Phys.Chem.94. 1457-1464 (1990)
[Publications] K.Baba: "Hydrogen-Induced Ordering in Palladium-Rich Pd-Mn Alloys" J.Less-Common Metals. 172-174. 246-253 (1991)
[Publications] F.L.Chen: "Hydrogen Solubility in Palladium-Ytterbium Solid Solution Alloys" J.Less-Common Metals. 172-174. 56-63 (1991)
[Publications] A.Kagawa: "Absorption of Hydrogen by Vanadium-Rich V-Ti Based Alloys" J.Less-Common Metals. 172-174. 64-70 (1991)
[Publications] 坂本,芳一: "金属水素化物ヒートポンプ材用バナジウム基固溶合金の開発" 先端技術研究成果報告書-長崎先端技術開発協議会. 8. 39-49 (1991)
[Publications] Y.Sakamoto: "Effects of Non-Fickian Up-Hill Components of Permeation Flux on Estimations of Hydrogen Diffusion Coefficents in Pd/H System" Scripta Metall.Mater.25. 1629-1634 (1991)
[Publications] Y.Sakamoto: "The Phase Transitions in Palladium-Rich Pd-Li Alloy Systems and Hydrogen Solubility in the Solid Solution Alloys" Z.Phys.Chem.173. 235-250 (1991)
[Publications] Y.Sakamoto: "Thermodynamics of Solution of Hydrogen in Pd-Cu and Pd-Cu-Au Solid Solution Alloys" Ber.Bunsenges.Phys.Chem.95. 680-688 (1991)
[Publications] Y.Sakamoto: "The Kinetics of Hydrogen-Induced Ordering in Pd_3Mn to the Ll_2-type Structure" J.Alloys and Compounds. 184. 57-67 (1992)
[Publications] T.B.Flanagan: "Hydrogen-Induced Metal Atom Rearrangements in Pd_<3+X> Mn_<1-X> Alloys with x≧0 using TEM,Electrical Resistivities and H_2 Solubilities" J.Alloys and Compounds. 184. 69-85 (1992)
[Publications] Y.Sakamoto: "Permeabilities and Diffusivities of Hydrogen in Palladium-Rich Pd-Y(Gd)-Ag Alloys" J.Alloys and Compounds. 185. 191-205 (1992)
[Publications] Y.Sakamoto: "Solubility of Hydrogen in Palladium-Yttrium-Silver Alloys" Ber.Bunsenges.Phys.Chem.96. 128-133 (1992)
[Publications] T.B.Flanagan: "Hydrogen Solution and Hydride Formation in Disordered and Ordered Palladium Alloys" Platinum Metals Review. 37. 26-37 (1993)
[Publications] Y.Sakamoto: "Electrochemical Hydrogen Charge Characteristics of Metal Hydride Electrodes" Ber.Bunsenges.Phys.Chem.96. (1992)
[Publications] 坂本,芳一: "90日本冷凍空調年鑑(分担執筆)" 日本冷凍冷房新聞社, 2 (1990)

1992 Fiscal Year Annual Research Report

金属水素化物ヒートポンプ材用バナジウム基固溶合金の開発

Principal Investigator

坂本 芳一 長崎大学, 工学部, 教授 (50026019)

Research Products

[Publications] Y.Sakamoto: "Hydrogen Solubility in Palladium-Vanadium Alloys" Z.Phys.Chem.Neue Folge. 165. 67-81 (1989)

[Publications] Y.Sakamoto: "Absorption of Hydrogen by Palladium-Nickel Alloys" Z.Phys.Chem.Neue Folge. 162. 83-96 (1989)

[Publications] F.L.Chen: "X-Ray Investigation of the α/β Miscibility Gaps in Hydrogenated Palladium-Rare Earth Alloys" J.Less-Common Metals. 155. 173-184 (1989)

[Publications] 坂本,芳一: "金属水素化物ヒートポンプ材用バナジウム固溶合金の開発" 省エネルギー. 41. 9-12 (1989)

[Publications] Y.Sakamoto: "Absorption of Hydrogen by Pd-Nb(Ta) Solid Solution Alloys" J.Chem.Soc.,Faraday Trans.86. 377-385 (1990)

[Publications] Y.Sakamoto: "X-Ray Studies of the Absorption of Hydrogen by Pd-rich Pd-(Tb,Tm,Lu)Alloys" J.Less-Common Metals. 159. 191-198 (1990)

[Publications] Y.Sakamoto: "Thermodynamic Behaviour of Hydrogen in Palladium-Gadoli-nium Solid Solution Alloys" Ber.Bunsenges.Phys.Chem.94. 190-198 (1990)

[Publications] Y.Sakamoto: "The (α+β) Hydrogen Miscibility Gaps in Hydrogenated Palladium Rich Pd-Y(Gd)-Ag Ternary Alloys" J.Less-Common Metals. 166. 45-56 (1990)

[Publications] Y.Sakamoto: "Thermodynamic Studies of the Absorption of Hydrogen by Pd-Ti(Zr) Solid Solution Alloys" Ber.Bunsenges.Phys.Chem.94. 1457-1464 (1990)

[Publications] K.Baba: "Hydrogen-Induced Ordering in Palladium-Rich Pd-Mn Alloys" J.Less-Common Metals. 172-174. 246-253 (1991)

[Publications] F.L.Chen: "Hydrogen Solubility in Palladium-Ytterbium Solid Solution Alloys" J.Less-Common Metals. 172-174. 56-63 (1991)

[Publications] A.Kagawa: "Absorption of Hydrogen by Vanadium-Rich V-Ti Based Alloys" J.Less-Common Metals. 172-174. 64-70 (1991)

[Publications] 坂本,芳一: "金属水素化物ヒートポンプ材用バナジウム基固溶合金の開発" 先端技術研究成果報告書-長崎先端技術開発協議会. 8. 39-49 (1991)

[Publications] Y.Sakamoto: "Effects of Non-Fickian Up-Hill Components of Permeation Flux on Estimations of Hydrogen Diffusion Coefficents in Pd/H System" Scripta Metall.Mater.25. 1629-1634 (1991)

[Publications] Y.Sakamoto: "The Phase Transitions in Palladium-Rich Pd-Li Alloy Systems and Hydrogen Solubility in the Solid Solution Alloys" Z.Phys.Chem.173. 235-250 (1991)

[Publications] Y.Sakamoto: "Thermodynamics of Solution of Hydrogen in Pd-Cu and Pd-Cu-Au Solid Solution Alloys" Ber.Bunsenges.Phys.Chem.95. 680-688 (1991)

[Publications] Y.Sakamoto: "The Kinetics of Hydrogen-Induced Ordering in Pd_3Mn to the Ll_2-type Structure" J.Alloys and Compounds. 184. 57-67 (1992)

[Publications] T.B.Flanagan: "Hydrogen-Induced Metal Atom Rearrangements in Pd_<3+X> Mn_<1-X> Alloys with x≧0 using TEM,Electrical Resistivities and H_2 Solubilities" J.Alloys and Compounds. 184. 69-85 (1992)

[Publications] Y.Sakamoto: "Permeabilities and Diffusivities of Hydrogen in Palladium-Rich Pd-Y(Gd)-Ag Alloys" J.Alloys and Compounds. 185. 191-205 (1992)

[Publications] Y.Sakamoto: "Solubility of Hydrogen in Palladium-Yttrium-Silver Alloys" Ber.Bunsenges.Phys.Chem.96. 128-133 (1992)

[Publications] T.B.Flanagan: "Hydrogen Solution and Hydride Formation in Disordered and Ordered Palladium Alloys" Platinum Metals Review. 37. 26-37 (1993)

[Publications] Y.Sakamoto: "Electrochemical Hydrogen Charge Characteristics of Metal Hydride Electrodes" Ber.Bunsenges.Phys.Chem.96. (1992)

[Publications] 坂本,芳一: "90日本冷凍空調年鑑(分担執筆)" 日本冷凍冷房新聞社, 2 (1990)

坂本芳一長崎大学, 工学部, 教授 (50026019)