Preparation and characterisation of TIG-alloyed hybrid composite coatings for high-temperature tribological applications
There is an increasing interest in the tribology community for developing high-performance composite coatings to meet severe tribological conditions in advanced mechanical systems which require high operating temperature and long life. In the present work, powder preplacement and tungsten inert g...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Taylor & Francis
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/51383/ http://irep.iium.edu.my/51383/ http://irep.iium.edu.my/51383/1/P112_2016_IMF_Kamilu.pdf http://irep.iium.edu.my/51383/5/51383_Preparation%20and%20characterisation_wos.pdf http://irep.iium.edu.my/51383/6/51383_Preparation%20and%20characterisation_Scopus.pdf |
| Summary: | There is an increasing interest in the tribology community for developing high-performance
composite coatings to meet severe tribological conditions in advanced mechanical systems
which require high operating temperature and long life. In the present work, powder
preplacement and tungsten inert gas (TIG) torch melting techniques have been employed to
generate titanium carbide (TiC)-based composite coatings containing hexagonal boron nitride
(hBN) or Ni–P coated hBN (Ni–P-hBN) lubricant additive. The effects of preplaced powder
composition on the cross-sectional microstructures and surface hardnesses of the developed
coatings were analysed. Furthermore, the friction and wear behaviours of the composite
coatings at 600°C were evaluated using a Ducom ball-on-disc wear test rig. The results indicate
that the TIG-melted surface containing TiC and Ni–P-hBN powder mixtures exhibits optimum
properties combining good control of microstructures and uniformly distributed hardness as well
as excellent tribological properties due to the enhanced wettability action of Ni–P encapsulated
hBN particles. |
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