Effects of Specimen Shape, Size and Initial Occupancy on the Thermal Desorption Spectrum of Hydrogen

2014 ◽  
pp. 687-692
Author(s):  
Lin Cheng ◽  
Masato Enomoto
Keyword(s):  
Thermal Desorption ◽  
Thermal Desorption Spectrum ◽  
Desorption Spectrum ◽  
Specimen Shape

A New Method to Determine the Activation Energy for Hydrogen Desorption from Steels

2005 ◽  
Vol 475-479 ◽  
pp. 229-232
Author(s):  
Fu Gao Wei ◽  
Kaneaki Tsuzaki ◽  
Toru Hara
Keyword(s):  
Activation Energy ◽  
Thermal Desorption ◽  
Precise Measurement ◽  
Hydrogen Desorption ◽  
New Method ◽  
Thermal Desorption Spectrum ◽  
Thermal Desorption Spectrometry ◽  
Desorption Spectrum ◽  
Tic Particle ◽  
Best Fit

A new method has been developed to determine the activation energy for hydrogen desorption from steels by means of thermal desorption spectrometry (TDS). This method directly fits the Kissinger’s reaction kinetic formula dX/dt=A(1-X)exp(-Ed/RT) to experimentally measured thermal desorption spectrum and best fit yields the activation energy (Ed) and the value of constant A. It has been proven that this new method is applicable to precise measurement of the activation energy for hydrogen desorption from incoherent TiC particle, coherent TiC precipitate, grain boundary and dislocation in 0.05C-0.20Ti-2.0Ni and 0.42C-0.30Ti steels.

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