Calorimetric Studies of the Behavior of Hydrogen in Vanadium and Vanadium Alloys

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概要

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• Calorimetric measurements have been made on vanadium hydride (and deute-ride) to investigate the origin of excess specific heat due to H(D) atoms and themechanism of phase transitions. The specific heat in the at phase was found toincrease linearly with H(D) concentration at the rate of 2.0f0.1 k./11 atomand 2.4]0.1 k./D atom at 240'C, nearly independent of temperature. Theentropy changes on phase transitions, ASp.-p. and ASp.-., were measured as afunction of hydrogen concentration, and the effect of alloying addition on thesequantities was investigated. AS'p.-p. was found to be strongly affected by alloying,whereas ASp.-. was little affected. These results are at variance with the ordinarystructure model, and suggest that H(D) atoms are in the 4T configuration in the(X phase, and that a strong short-range order exists in the 73. and a phases. Fromthe effect of alto>rinu on AS,.,., the number of sites blocked by one impurityatom (blocking number) is deduced.

• 社団法人日本物理学会の論文
• 1985-09-15

著者

• Fukai Yuh

  Department Of Physics Chuo University

• Watanabe Kenji

  Department Of Anatomy Fukui Medical School

• Watanabe Kenji

  Department Of Agricultural Chemistry College Of Agriculture And Veterinary Medicine Nihon University

• Watanabe Kenji

  Department Of Physics Faculty Of Science And Engineering Chuo University

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