Issue 64, 2015
From the journal:

RSC Advances

Towards a better understanding of nickel/diamond interactions: the interface formation at low temperatures†

B. B. Bokhonov,*ab   A. V. Ukhina,a   D. V. Dudina,bc   K. B. Gerasimov,a   A. G. Anisimovc  and  V. I. Malic  

* Corresponding authors

a Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str. 18, Novosibirsk, Russia
E-mail: bokhonov@solid.nsc.ru
Fax: +7-383-332-28-47
Tel: +7-383-233-24-10

b Novosibirsk State University, Pirogova str. 2, Novosibirsk, Russia

c Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev ave. 15, Novosibirsk, Russia

Abstract

We report the formation and development of the interface between diamond and nickel in partially densified compacts obtained from powder mixtures by Spark Plasma Sintering, hot pressing and conventional sintering at 700 and 900 °C – temperatures, which are well below the melting point of nickel and even below that of the nickel–graphite eutectic. The nickel particles sintered among themselves and formed joints with facets of the diamond crystals. Most of these joints fractured cohesively leaving Ni-containing patches on the diamond facets. The microstructure of the patches adhered to the diamond surface in compacts sintered at 900 °C and their geometry and orientation relative to the edges of the diamond facets suggest that the formation and development of the nickel/diamond interface are associated with melting and solidification of the melt according to certain directions of the diamond crystalline lattice. A possible explanation of the formation of a liquid at such a low temperature is contact melting of a metastable eutectic between nickel and diamond.

Graphical abstract: Towards a better understanding of nickel/diamond interactions: the interface formation at low temperatures

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Article information

DOI
https://doi.org/10.1039/C5RA07840G
Article type
Paper
Submitted
29 Apr 2015
Accepted
04 Jun 2015
First published
05 Jun 2015

RSC Adv., 2015,5, 51799-51806

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Towards a better understanding of nickel/diamond interactions: the interface formation at low temperatures

B. B. Bokhonov, A. V. Ukhina, D. V. Dudina, K. B. Gerasimov, A. G. Anisimov and V. I. Mali, RSC Adv., 2015, 5, 51799 DOI: 10.1039/C5RA07840G

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