Surface modification of the Ti-Al alloys at 1000-1200 K
Alloys of Ti-40wt.%Al, Ti-43wt.%Al, Ti-48wt.%Al, Ti-47wt. %Al-2wt.%Nb-2wt.%Cr and Ti-47wt.%Al-2wt.%Nb-2wt.%Mn-0.8wt.%TiB2 were nitrided in ammonia at atmospheric pressure and at 1000-1200 K for 3.6×105 s. The hardness and thickness of the nitride layers on the alloys were measured. It was found that...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0035420430&partnerID=40&md5=cfc3d3372304ad9547351e0edd861934 http://cmuir.cmu.ac.th/handle/6653943832/4811 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Alloys of Ti-40wt.%Al, Ti-43wt.%Al, Ti-48wt.%Al, Ti-47wt. %Al-2wt.%Nb-2wt.%Cr and Ti-47wt.%Al-2wt.%Nb-2wt.%Mn-0.8wt.%TiB2 were nitrided in ammonia at atmospheric pressure and at 1000-1200 K for 3.6×105 s. The hardness and thickness of the nitride layers on the alloys were measured. It was found that the hardness values increased with increasing nitridation temperature and aluminum concentration in the alloys. The depth of nitridation and the mass gain of the nitrided specimens could be represented by an Arrhenius-type equation and the activation energies were calculated. The x-ray diffraction results were explained and are in agreement with the improvement of the hardness. Copyright © 2001 John Wiley & Sons, Ltd. |
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