Preparation and characterization of sintered polycrystalline diamond (PCD) with 15 wt% Nb binder
This study aimed to obtain and characterize a polycrystalline diamond body (PCD) sintered with 15 wt% Nb binder, through the high-pressure high-temperature (HPHT) sintering techniques at three different temperatures of 1650 °C, 1750 °C, and 1850 °C, with a pressure of 7.7 GPa. Characterizations on...
Na minha lista:
| Principais autores: | , , , , , , |
|---|---|
| Formato: | article |
| Idioma: | English |
| Publicado em: |
Elsevier
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/33227 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | This study aimed to obtain and characterize a polycrystalline diamond body (PCD) sintered with 15 wt% Nb
binder, through the high-pressure high-temperature (HPHT) sintering techniques at three different temperatures
of 1650 °C, 1750 °C, and 1850 °C, with a pressure of 7.7 GPa. Characterizations on the starting powders were
performed before and after high energy ball milling, and then the obtained mixture was sintered. The results
showed that niobium could perform as a good binder for the sintering PCD at the specified concentration,
achieving relative densities in the range of 96% to 100% for all three sintering temperatures. Also, analyses of
the electron micrographs and the Raman spectrograms showed that there was no graphitization, a common
problem in this type of material, and there was uniform dispersion of the niobium at the interfaces of the
diamond particles, and no cracking. |
|---|