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|Title:||High temperature oxidation and wear behaviour of powder metallurgically developed Ni-Cr-W-Al-Ti-MoS<sub>2</sub> composite|
Ni-Cr matrix composite
|Abstract:||Nickel-chromium matrix composites reinforced with tungsten, aluminum, titanium and molybdenum disulfides are developed by a powder metallurgy method. The high temperature oxidation properties, the friction and wear behaviour of the composites under dry sliding condition are investigated using the pin-on-disc. The oxidation behaviour of composite is studied by scanning electron microscopy (SEM), the worn surfaces and worn chips are observed by X-ray diffraction (XRD) and optical microscope. The results show that the kinetic curves of oxidation for composite obey the parabolic law, the oxide scales consist of Cr<sub>2</sub>O<sub>3</sub> and NiCr<sub>2</sub>O<sub>4</sub>. Both the friction coefficient and wear rate of composites decrease with the increase of temperature before 400°C, but the wear rate is the highest at 600°C. The oxidative wear is the main wear mechanism for the composites.|
|Appears in Collections:||IJEMS Vol.16(2) [April 2009]|
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