Development of nickel-phosphorus coatings containing micro particles of talc phyllosilicates

作者：Alexis Joel^*; Gaussens Clelia; Etcheverry Bernard; Bonino Jean Pierre

来源：Materials Chemistry and Physics, 2013, 137(3): 723-733.

DOI：10.1016/j.matchemphys.2012.09.049

• Mechanical properties
• Coatings
• Adhesion
• Composite materials
• Hardness

The present work aims to characterized nickel phosphorus coatings co-deposited with talc particles on steel. The NiP-talc composite deposits were developed to serve as hard coatings with a lubricating effect at 600 degrees C. This process, which is free of hexavalent chromium, could provide a reliable substitute for the electrodeposition of hard chromium coating used in industrial applications. Local responses to static and dynamic mechanical loading have been obtained by nano- and microhardness, microtensile and nano-scratch testing. The hardness and stiffness values slightly decrease when the amount of talc increases for untreated coatings. In contrast, a 420 degrees C heat treatment leads to high hardness and Young%26apos;s modulus values due to crystallization. Moreover, a 600 degrees C heat treatment lowers these values through overageing. A 420 degrees C heat treatment greatly improves the adherence and the cohesion of the coatings containing talc.

• 出版日期2013-1-15