Synthesis of polycrystalline diamond compact with magnesium carbonate and its physical properties

Akaishi, Minoru; Yamaoka, Shinobu; Ueda, Fumihiro; Ohashi, Tadakazu

doi:10.1016/0925-9635(95)00332-0

Cited by 36 publications

(14 citation statements)

References 8 publications

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“…Earth-alkali carbonate binders have been used extensively as a replacement for the metallic binder. PCD materials sintered in the presence of these carbonates have mechanical properties similar to metallic PCD and exhibit improved thermal stability (1200°C) [10,22,23]. However, this material requires elevated (when compared to current production processes) sintering conditions of N 7.7 GPa and N 2000°C for successful sintering, which increases the cost of manufacturing.…”

Section: Introductionmentioning

confidence: 95%

Characterisation of thermally degraded polycrystalline diamond

Westraadt

Sigalas

Neethling

2015

International Journal of Refractory Metals and Hard Materials

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Section: Introductionmentioning

confidence: 95%

Characterisation of thermally degraded polycrystalline diamond

Westraadt

Sigalas

Neethling

2015

International Journal of Refractory Metals and Hard Materials

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“…4 In regard to the synthesis of PCDs with heat-resistant properties, we previously have reported the synthesis of PCDs with small amounts of metals. [5][6][7] (such as cobalt, nickel, and super invar alloy) or alkaline carbonates 8 (such as CaCO 3 and MgCO 3 ) as a sintering agent. Among the PCDs, that with MgCO 3 shows superior heat resistance without any graphitization and cracking, even after a treatment of 1400°C under vacuum.…”

Section: Introductionmentioning

confidence: 99%

High‐Pressure Synthesis of Heat‐Resistant Diamond Composite Using a Diamond‐TiC_0.6 Powder Mixture

Hong

Akaishi

Yamaoka

1999

Journal of the American Ceramic Society

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The sintering behavior of synthetic diamond with a grain size of 2-4 µm was investigated at high pressure and high temperatures (6.5 GPa and 1600°-1900°C, respectively) in the presence of TiC 0.6 or TiC. No well-sintered diamond composite was synthesized from a diamond-TiC powder mixture under the examined conditions; however, a wellsintered diamond composite with a homogeneous microstructure was synthesized under the conditions of 6.5 GPa and temperatures >1800°C using a diamond-TiC 0.6 powder mixture. The diamond composite was hard (Vickers hardness of 45 GPa) and was composed of diamond and TiC, in which TiC was formed via the reaction of TiC 0.6 and carbon atoms of diamond. Neither graphitization nor cracking was observed in or on the composite after successive heat treatment at 900°-1400°C for 30 min each under vacuum. The Vickers hardness of the composite that was treated at 1500°C decreased to 40 GPa, whereas the Vickers hardness values for composites treated at temperatures of <1400°C were not changed. The present diamond composite is believed to be one of the most heat-resistant materials among the superhard composites and can be used as heat-resistant tools for superhard materials.

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“…Figure 8. Ultrasonic sound velocities versus relative density together with least square fitted Equation (2). The square ( ) is the full density calcite value and the triangle ( ) is the values from Grady [29].…”

Section: Effect Of Density On Wave Velocitiesmentioning

confidence: 99%

“…Commonly used agents are metal carbonates such as CaCO 3 , MgCO 3 and SrCO 3 . Ueda et al [1] and Akaishi et al [2] sintered diamond using MgCo 3 using pressure up to 7.7 GPa and temperatures of 2000 • C.…”

Section: Introductionmentioning

confidence: 99%

High pressure characterization and modelling of CaCO₃powder mix in the Bridgman anvil apparatus

Berg

Jonsén

Häggblad

et al. 2012

High Pressure Research

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For investigating high pressure sintering processes, numerical models can be used. This will demand material models which give realistic mechanical response throughout the whole parameter space of the actual process. As the pressures become higher, the material density approaches its full theoretical value and the elastic part of the material properties becomes increasingly important. In this investigation, Poisson's ratio was determined using ultrasonic pulse-echo measurements. A new elastic model and an improved plasticity model were implemented into a user-defined material subroutine in a finite element (FE) code. To experimentally investigate the load displacement response and pressure distribution in powder compacts during pressing, a pressure instrumented Bridgman anvil apparatus was used. Validation of the FE model was conducted against experimental data from pressing experiments using two different start densities. The results show that the simulation model is indeed capable of reproducing load-thickness curves and pressure profiles reasonable close to the experimental curves.

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Synthesis of polycrystalline diamond compact with magnesium carbonate and its physical properties

Cited by 36 publications

References 8 publications

Characterisation of thermally degraded polycrystalline diamond

Characterisation of thermally degraded polycrystalline diamond

High‐Pressure Synthesis of Heat‐Resistant Diamond Composite Using a Diamond‐TiC_0.6 Powder Mixture

High pressure characterization and modelling of CaCO₃powder mix in the Bridgman anvil apparatus

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Synthesis of polycrystalline diamond compact with magnesium carbonate and its physical properties

Cited by 36 publications

References 8 publications

Characterisation of thermally degraded polycrystalline diamond

Characterisation of thermally degraded polycrystalline diamond

High‐Pressure Synthesis of Heat‐Resistant Diamond Composite Using a Diamond‐TiC0.6 Powder Mixture

High pressure characterization and modelling of CaCO3powder mix in the Bridgman anvil apparatus

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High‐Pressure Synthesis of Heat‐Resistant Diamond Composite Using a Diamond‐TiC_0.6 Powder Mixture

High pressure characterization and modelling of CaCO₃powder mix in the Bridgman anvil apparatus