Properties of VK6-diamond composites sintered in shock waves

Novikov, N. I.; Maistrenko, A. L.; Trefilov, V. I.; Kovtun, V. I.

doi:10.1007/bf00560028

Cited by 2 publications

(3 citation statements)

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“…The size of the binder grains in the diamond interaction area is smaller than in the matrix. All these facts corroborate to the result that the adhesion of the diamond, in the present work, is better than in other investigations [1][2][3].…”

Section: Resultssupporting

confidence: 93%

“…The efficiency of well and rock drilling tools depends on the properties of its cutting elements. The cutting elements are manufactured using various technologies, starting from a composition of tungsten carbide (WC) and cobalt (Co) powders, diamond powder (Dia), and, eventually, the addition of some doping elements [1][2][3]. The development of superhard materials via special powder metallurgy has a long history [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…The composite made of 50% natural diamond and 50% hard metal (WC+Co), known as Slavutitch, was initially produced via powder metallurgy, varying the sintering parameters [7]. One of the Slavutitch modifications had the following properties: diamond powder with grain size range from 315 to 400 µm; shape coefficient of 1.0 to 1.2; volume of diamond in the body of the sample of 25%; density of 15.1 g/cm 3 ; hardness of 90-91 HRA; impact resistance of 1.68•10 4 J/m 2 ; flexural resistance of 1580 MPa; yield strength during uniaxial compression of 3980 MPa [8]. Due to the critical shortage of natural diamonds 20 years ago, a technology of composite materials based on synthetic diamonds had to be developed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study on WC-Co-Diamond-Based Composites Used in Cutters of Drill Bits

Bobrovinitchii

Skury

Filgueira

et al. 2010

MSF

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Inserts of drill bits used in perforation of wells are employed to cut many different kinds of stone. The material that shows the best performance on this application is the WC+Co+Diamond composite, obtained via powder metallurgy. However, heterogeneous microstructural aspects in these composites may impair their efficiency. On this work, WC+6%Co-based composites were obtained via high pressure sintering at 5.0 GPa, with diamonds, WC and Co powders. The particle size of the diamond was 400/315 μm, and for the WC and Co, 100/63 μm. Part of the samples also received 2wt%CrB2 as a doping agent. Wear tests were carried out in an abrasimeter with a maximum axial load of 50 kg. Linear and volumetric wear indices achieved values of 821∙10-6 g/m and 10.7 g/m3, that are superior to inserts produced via conventional powder metallurgy.

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Section: Resultssupporting

confidence: 93%