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|Title:||High temperature oxidation and wear behaviour of powder metallurgically developed Ni-Cr-W-Al-Ti-MoS2 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 Cr2O3 and NiCr2O4. 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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