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International Journal of Refractory Metals and Hard Materials | Vol.90, Issue. | 2020-07-31 | Pages 105234

$International Journal of Refractory Metals and Hard Materials$

Niobium as a new binder for polycrystalline diamond (PCD) sintered via High Pressure-High Temperature (HPHT)

Mayara Adrielly Leal de Oliveira Rodrigues Lucas Pires de Paiva Barreto Uílame Umbelino Gomes Marcello Filgueira Diego Pires Gurgel Lukas Bichler Meysam Mashhadikarimi

Abstract

In this research, the effect of adding 2.5, 5.0 and 10 wt% niobium (Nb) as a binding agent was investigated for High Pressure-High Temperature (HPHT) sintering of polycrystalline diamond (PCD). Samples were sintered at 1750 °C and 7.7 GPa. Detailed characterization of the as-sintered materials revealed a uniform dispersion of the Nb additives in the diamond matrix and no interfacial cracking was observed. Higher concentration of binder increased tendency to intergranular failure. The formation of NbC and NbC0.84 phases after sintering was identified, indicating that some of the matrix carbon may have undergone graphitization.

Original Text (This is the original text for your reference.)

Niobium as a new binder for polycrystalline diamond (PCD) sintered via High Pressure-High Temperature (HPHT)

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Keywords

diamond interfacial cracking binding nbc084 nb additives temperature hpht sintering nbc

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Mayara Adrielly Leal de Oliveira Rodrigues, Lucas Pires de Paiva Barreto, Uílame Umbelino Gomes, Marcello Filgueira,Diego Pires Gurgel, Lukas Bichler, Meysam Mashhadikarimi,.Niobium as a new binder for polycrystalline diamond (PCD) sintered via High Pressure-High Temperature (HPHT). 90 (),105234.

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