Improving wear resistance of drilling tools fitted with synthetic diamond

The purpose of this work is to substantiate the possibility of using a new composite sintered in the "diamond-carbonate" system for equippingdiamond drilling tools with high wear resistance and efficiency of rock destruction. The research technique consisted in establishing the influence of the wear resistance of the cutting edge of the samplesof a superhard composite diamond-containing material on the efficiency of rock destruction, assessed by the granulometric composition of its sludge. Research results. The two-phase superhard composite materials diamond – CaMg(CO3)2 and diamond – SrCO3 were obtained as a result of sintering by the method of impregnation of diamond micropowder with carbonate melts under conditions of a high pressure of 8.0 GPa and a temperature of 2100 °C. Wear resistance of the investigated composite sampleswas determined by based on the results of turning the core of granite from the Korostyshevskoye deposit of the X category of drilling. Determination of the size and shape of particles of granite fragments of the Korostyshevskoye deposit, taken during its destruction was carried out by laser diffraction and digital image analysis using a Microtrac Sync analyzer.The relationship between the degree of its wear of the cutting edge of composite samplesand the energy consumption of rock destruction, the size distribution of particles in the cuttings sample and their specific surface was established after analyzing the results of the study of wear resistance and the nature of their wear. Plates of the diamond–CaMg(CO3)2 composite, which have a higher wear resistance compared to other composites, are characterized by an increase in the proportion of large particles in the cuttings sample and a decrease in the value of their specific surface, which indicates a more rational use of energy, which goes to a greater extent for destruction rock and to a lesser extent for friction and wear. Practical value. The research results allow us to make a conclusion about the advisability of equipping a drilling rock cutting tool with samplesof a diamond–CaMg(CO3)2 composite in order to increase its wear resistance and the efficiency of rock destruction.

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The influence of physical-mechanical characteristics of AS6 synthetic diamond powders on wear resistance of grinding tools

Journal of Superhard Materials ◽

10.3103/s1063457613050079 ◽

2013 ◽

Vol 35 (5) ◽

pp. 309-315 ◽

Cited By ~ 4

Author(s):

V. I. Lavrinenko ◽

G. D. Il’nitskaya ◽

G. A. Petasyuk ◽

V. N. Tkach ◽

V. V. Smokvina ◽

...

Keyword(s):

Wear Resistance ◽

Mechanical Characteristics ◽

Synthetic Diamond ◽

Diamond Powders

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Application of TEM to Deformation, Wear, and Fracture of Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052377 ◽

1974 ◽

Vol 32 ◽

pp. 472-473

Author(s):

B. J. Hockey

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Mechanical Behavior ◽

Brittle Materials ◽

High Temperature Strength ◽

Wide Range ◽

Corrosive Environments ◽

Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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Reflection electron microscopy of as-grown diamond surfaces

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100150861 ◽

1993 ◽

Vol 51 ◽

pp. 1006-1007

Author(s):

Z.L. Wang ◽

J. Bentley ◽

R.E. Clausing ◽

L. Heatherly ◽

L.L. Horton

Keyword(s):

Electron Microscopy ◽

Synthetic Diamond ◽

High Energy ◽

Dark Field ◽

Reverse Direction ◽

Diamond Surfaces ◽

Grain Sizes ◽

Synthetic Diamonds ◽

De Beers ◽

Reflection Electron Microscopy

It has been found that the abrasion of diamond-on-diamond depends on the crystal orientation. For a {100} face, the friction coefficient for sliding along <011> is much higher than that along <001>. For a {111} face, the abrasion along <11> is different from that in the reverse direction <>. To interpret these effects, a microcleavage mechanism was proposed in which the {100} and {111} surfaces were assumed to be composed of square-based pyramids and trigonal protrusions, respectively. Reflection electron microscopy (REM) has been applied to image the microstructures of these diamond surfaces.{111} surfaces of synthetic diamond:The synthetic diamonds used in this study were obtained from the De Beers Company. They are in the as-grown condition with grain sizes of 0.5-1 mm without chemical treatment or mechanical polishing. By selecting a strong reflected beam in the reflection high-energy electron diffraction (RHEED) pattern, the dark-field REM image of the surface is formed (Fig. 1).

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