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In the present work, NiCr–BaMoO4 self-lubricating composites have been fabricated by hot pressing to evaluate their tribological properties at elevated temperatures. Hydrothermal synthesis method has been used to prepare fine BaMoO4 spherical powders with a size of 500nm by adjusting different technological parameters. The synthesized BaMoO4 powders have a good thermal stability in air after calcining...
This present work concentrates on the influence of microarc oxidation ceramic coatings on microstructure and tribological properties of Ti2AlNb alloy. A variety of ceramic coatings are formed on Ti2AlNb alloy in NaAlO2 and Na2SiO3 electrolytes, respectively. A two-step voltage-controlled technology was also used to tailor the microstructure of MAO coatings by adjusting the oxidation time. Microstructure...
In recent years, the increasing potential for the use of high temperature self-lubricating composites as sliding components at extreme environments have attracted great attention on these materials. In the present work, NiCr–BaCr 2 O 4 self-lubricating composites have been prepared using the hot pressing method. The friction and wear properties of NiCr–BaCr 2 O 4 composites...
TiN–TiB 2 composites incorporated with or without MoSi 2 have been prepared by the reactive hot pressing method, using Ti, BN or MoSi 2 powders as the starting materials. The influence of MoSi 2 addition on tribological properties of TiN–TiB 2 composites have been evaluated by using a ball-on-disk friction and wear tester in sliding against alumina ball from...
In the present work, Ni–BaCr 2 O 4 composite coatings were electrodeposited on superalloy Inconel 718 from a Watts type electrolyte containing BaCr 2 O 4 particles, which were dispersed in suspension with the aid of a cationic surfactant cetyltrimethylammonium bromide (CTAB). BaCr 2 O 4 particles were synthesized by solid state reaction method and had...
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