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High-Temperature Hydrogenation Behavior of Titanium Aluminum Carbide |
Chen CHEN1,2,**,Haibin ZHANG1( ),Shuming PENG1,Xinggui LONG1,Jianguo ZHU2 |
1. Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900 2. College of Materials Science and Engineering, Sichuan University, Chengdu 610065 |
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Cite this article:
Chen CHEN,Haibin ZHANG,Shuming PENG,Xinggui LONG,Jianguo ZHU. High-Temperature Hydrogenation Behavior of Titanium Aluminum Carbide. Chinese Journal of Materials Research, 2014, 28(11): 858-864.
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Abstract The thermal stability of Ti3AlC2, a kind of ternary laminated machinable ceramic, in hydrogen atmosphere at 1100-1400℃ was investigated. The phase composition and surface morphology of Ti3AlC2 before and after hydrogenation were characterized by means of XRD, SEM, SIMS, and Raman. The resulted gaseous products of the hydrogenation process were calculated by Factsage software. Results show that during hydrogenation a small amount of hydrogen dissolves in Ti3AlC2; Ti3AlC2 decomposes into metastable phase of Ti3AlxC2 by stripping Al atoms. Most of the stripped Al atoms react with the scarce oxygen in the atmosphere to form a homogeneous but not dense Al2O3 film, which even spalls off at 1400℃. A gaseous phase of AlH is predicted by the calculation with thermodynamic software. The preliminary results indicate that Ti3AlC2 has a good hydrogen resistance at temperatures below 1300℃.
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Received: 17 April 2014
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Fund: *Supported by National Natural Science Foundation of China No. 91326102, Science and Technology Development Foundation of China Academy of Engineering Physics No. 2012B0302035 & 2013A0301012. |
About author: **To whom correspondence should be addressed, Tel: (0816)2497408, E-mail: |
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