Kinetics of hydrogen absorption in Ti-V-Cr burn-resistant alloy

Xiaoli Wang; Yongqing Zhao; Yaoqi Wang; Hongliang Hou; Weidong Zeng

Kinetics of hydrogen absorption in Ti-V-Cr burn-resistant alloy

Xiaoli Wang, Yongqing Zhao, Yaoqi Wang, Hongliang Hou, Weidong Zeng

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The hydrogen absorption kinetics of Ti40 alloy was studied in the temperature range of 550-700°C and the pressure range of 15.88-45.88 kPa. The initial temperature of hydrogen absorption for Ti40 alloy is 515°C. With the increase of temperature and initial hydrogen pressure, the time to reach the equilibrium condition becomes shorter, while hydrogen absorption rate and equilibrium hydrogen pressure increase. At low temperature, the process of hydrogen absorption consists of three stages: I incubation stage, II the first absorption stage and III the second absorption stage. At the same temperature, the rate constants at different stages follow the relation: k_II>k_I>k_III. At the same stage, the rate constants increase with the increase of temperature. The activation energy of the first and second absorption stage are 73.3 kJ/mol and 29.6 kJ/mol, respectively. The rate controlling step at the second absorption stage is the hydrogen diffusion in β-Ti.

Original language	English
Pages (from-to)	1514-1518
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	40
Issue number	9
State	Published - Sep 2011

Keywords

Activation energy
Hydrogen absorption
Kinetics
Mechanism function

Cite this

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title = "Kinetics of hydrogen absorption in Ti-V-Cr burn-resistant alloy",

abstract = "The hydrogen absorption kinetics of Ti40 alloy was studied in the temperature range of 550-700°C and the pressure range of 15.88-45.88 kPa. The initial temperature of hydrogen absorption for Ti40 alloy is 515°C. With the increase of temperature and initial hydrogen pressure, the time to reach the equilibrium condition becomes shorter, while hydrogen absorption rate and equilibrium hydrogen pressure increase. At low temperature, the process of hydrogen absorption consists of three stages: I incubation stage, II the first absorption stage and III the second absorption stage. At the same temperature, the rate constants at different stages follow the relation: kII>kI>kIII. At the same stage, the rate constants increase with the increase of temperature. The activation energy of the first and second absorption stage are 73.3 kJ/mol and 29.6 kJ/mol, respectively. The rate controlling step at the second absorption stage is the hydrogen diffusion in β-Ti.",

keywords = "Activation energy, Hydrogen absorption, Kinetics, Mechanism function",

author = "Xiaoli Wang and Yongqing Zhao and Yaoqi Wang and Hongliang Hou and Weidong Zeng",

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TY - JOUR

T1 - Kinetics of hydrogen absorption in Ti-V-Cr burn-resistant alloy

AU - Wang, Xiaoli

AU - Zhao, Yongqing

AU - Wang, Yaoqi

AU - Hou, Hongliang

AU - Zeng, Weidong

PY - 2011/9

Y1 - 2011/9

N2 - The hydrogen absorption kinetics of Ti40 alloy was studied in the temperature range of 550-700°C and the pressure range of 15.88-45.88 kPa. The initial temperature of hydrogen absorption for Ti40 alloy is 515°C. With the increase of temperature and initial hydrogen pressure, the time to reach the equilibrium condition becomes shorter, while hydrogen absorption rate and equilibrium hydrogen pressure increase. At low temperature, the process of hydrogen absorption consists of three stages: I incubation stage, II the first absorption stage and III the second absorption stage. At the same temperature, the rate constants at different stages follow the relation: kII>kI>kIII. At the same stage, the rate constants increase with the increase of temperature. The activation energy of the first and second absorption stage are 73.3 kJ/mol and 29.6 kJ/mol, respectively. The rate controlling step at the second absorption stage is the hydrogen diffusion in β-Ti.

AB - The hydrogen absorption kinetics of Ti40 alloy was studied in the temperature range of 550-700°C and the pressure range of 15.88-45.88 kPa. The initial temperature of hydrogen absorption for Ti40 alloy is 515°C. With the increase of temperature and initial hydrogen pressure, the time to reach the equilibrium condition becomes shorter, while hydrogen absorption rate and equilibrium hydrogen pressure increase. At low temperature, the process of hydrogen absorption consists of three stages: I incubation stage, II the first absorption stage and III the second absorption stage. At the same temperature, the rate constants at different stages follow the relation: kII>kI>kIII. At the same stage, the rate constants increase with the increase of temperature. The activation energy of the first and second absorption stage are 73.3 kJ/mol and 29.6 kJ/mol, respectively. The rate controlling step at the second absorption stage is the hydrogen diffusion in β-Ti.

KW - Activation energy

KW - Hydrogen absorption

KW - Kinetics

KW - Mechanism function

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M3 - 文章

AN - SCOPUS:80054838247

SN - 1002-185X

VL - 40

SP - 1514

EP - 1518

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 9

ER -

Kinetics of hydrogen absorption in Ti-V-Cr burn-resistant alloy

Abstract

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