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Wear performance of titanium and niobium added MOS2 coatings under isobutane exposure

Akşit, Mahmut Faruk and Kızıl, Hüseyin and Efeoğlu, İhsan and Sariibrahimoğlu, Kemal (2009) Wear performance of titanium and niobium added MOS2 coatings under isobutane exposure. In: ASME/STLE International Joint Tribology Conference (IJTC 2009), Memphis, Tennessee, USA

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Abstract

As conventional refrigerants phased out, Hydrocarbons such as Isobutane emerged as the main alternative in refrigeration industry. However, compatibility of these new ozone friendly refrigerants with compressor oils and bearing materials need to be evaluated. This study investigates wear performance of Titanium and Niobium added MoS2 coatings running against 100Cr6 steel under isobutane exposure. Wear performance is established under starved lubrication condition by comparing the maximum achieved sliding distance before the sudden increase and fluctuation of the friction curve. Sinter steel samples were coated with MoS2, MoS2-Ti, MoS2-Nb thin films by magnetron sputtering. The concept of durability distance has been defined as the distance until a sudden fluctuation of the friction curve is observed. It was found that addition of Titanium and Niobium adversely affects wear performance of the MoS2 coatings under isobutane exposure. This can be attributed to the possible degradation of MoS2 lamellar structure that acts as solid lubricant under such exposure.

Item Type:Papers in Conference Proceedings
Uncontrolled Keywords:Sintered iron, starved lubrication, R600a
Subjects:T Technology > TJ Mechanical engineering and machinery
T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
ID Code:13644
Deposited By:Mahmut Faruk Akşit
Deposited On:08 Jan 2010 15:27
Last Modified:25 May 2011 14:17

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