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Quality and wear behavior of graded polycrystalline diamond compact cutters

Yahiaoui, Malik and Paris, Jean-Yves and Delbé, Karl and Denape, Jean and Gerbaud, Laurent and Colin, Christophe and Ther, Olivier and Dourfaye, Alfazazi Quality and wear behavior of graded polycrystalline diamond compact cutters. (2016) International Journal of Refractory Metals and Hard Materials, 56. 87-95. ISSN 02634368

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Official URL: http://dx.doi.org/10.1016/j.ijrmhm.2015.12.009

Abstract

The wear behavior of conventional and graded polycrystalline diamond compact cutters was studied using a vertical lathe with mortar counterfaces. Different cutters were considered regarding to their diamond grain size and the high pressure and the high temperature conditions of the manufacturing process (HPHT). On the base of these cutters, a cobalt graduation process was performed on the WC–Co substrates by reactive imbibition. A quality factor developed in previous studies was calculated to evaluate cutters wear performances. The results showed that a controlled HPHT process can act on the wear resistance certainly by improving the diamond grain boundary cohesion. Unexpectedly, the diamond granulometry appeared to be a secondary factor influencing the wear resistance. The reactive imbibition clearly increased the wear resistance, even for cutters with coarse diamond grains (i.e. potentially impact resistant). Finally, a third body approach describes that the quartz particles detached from the mortar rock realizes abrasive scratches on the cutters wear flat. When the wear flat reaches the substrate, the formation of voids in the contact, associated with the trapping of abrasive particles, rises the wear kinetic. As a secondary mechanism, Raman spectroscopy measurements highlighted tribological transformed structures by the formation of graphite and amorphous carbon on the diamond worn surfaces.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at : http://www.sciencedirect.com/science/journal/02634368
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Mines ParisTech (FRANCE)
Other partners > Varel Europe (FRANCE)
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Deposited On:13 Jan 2016 14:20

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