Citation

Levashov EA, Akulinin PV, Sorokin MN, Sviridova TA, Hosomi S, Ohyanagi M, Koizumi S. Physics of Metals and Metallography 2004; 97(1): 41-49.

Copyright

(Copyright © 2004)

DOI

unavailable

PMID

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Abstract

The main features of the phase and structure formation in diamond-containing functionally graded materials (FGMs) with a ceramic binder based on titanium diboride and titanium nitride TiB2-TiN or titanium suicide and titanium nitride Ti5Si3-TiN have been studied for the first time. The effect of the mass of a "chemical furnace" on the residual strength of diamond in the diamond-containing SHS-FGM layer is studied. For the binder based on titanium nitride and titanium diboride, the maximum residual strength of diamond grains is 24 N for the sample with 12.5 vol % diamond in the charge layer and 29 N for the sample with 25 vol % diamond (the initial diamond strength was 37 N). For the binder based on the titanium nitride and titanium silicide (at the same initial strength of diamond), the residual strength of diamond grains formed in the synthesis products is 32.5 and 28.7 N for the samples with 12.5 vol % and 25 vol % diamond, respectively. The introduction of 5% titanium hydride into the charge diamond-containing layer is shown to improve the preservation of diamond in the case of the binder based on titanium diboride and titanium nitride. Optimum conditions for producing high-quality products with a high degree of preservation and high strength of diamond grains have been found.

Language: en