Reaction sintering of diamond was investigated using a starting mixed powder of purified natural graphite and a binary solvent-catalyst of the Fe-Ti system under high pressure (7G Pa) and temperature (1700°C) conditions for e treatment time of 1 to 15 min. Diamond sintered compact of about 100% conversion ratio from graphite todiamond was obtained with the binary solvent-catalyst content: 11.4 to 17.0 vol% (30 to 40wt%) Fe and 6.6 to 7.7vol% (10wt%) Ti. The sintered compact having the bulk density of 4.1 to 5.5g cm−3, consisted of diamond phase and metal carbide (Fe3C and TiCx) phase. The Vickers microhardnesm (under 1000 g load) mfthesintered diamond phase was >8OO0, while that ofthe metal carbide phase was 1000 to 2000. The transformation from graphite to diamond proceeded in a short time (< 1 min), which was followed by a particle joining between the formed diamond grains, when the densification would be attained at the reaction time of 15 min by pooling out the melt of carbon and solvent-catalyst.
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L. F. Trueb andW. C. Butterman,Amer. Mineral. 54 (1969) 412.
J. E. Field, “The Properties o1 Diamond” (Academic Press, London, 1979) p. 336.
R. H. Wentorf Jr,R. C. DeFries andF. P. Bundy,Science 208 (1980) 873.
H. Katzman andW. F. Libby,Science 172 (1971) 1132.
L. E. Hibbs Jr andR. H. Wentorf Jr,High Temp.High Press. 6 (1974) 409.
M. Akaishi, Y. Sato, N. Setaka, T. Ohsawa andO. Fukunaga,Amer. Ceram. Soc. Bull 62 (1983) 689.
I. Kushtalova, I. Krstanovjc, I. Stasyuk, S. M. Radio andM. M. Ristic,Mater. Sci. Res. 16 (1984) 171.
H. T. Hall,Science 169 (1970) 868.
H. D. Stromberg andR. D. Stephens,Amer. Ceram. Soc. Bull. 49 (1970) 1030.
N. Suzuki, A. Nakaue andO. Okuma,AtsuryokuGijutsu J. Jpn High Press. Inst. 12 (1974) 301.
S. Naka, H. Itoh andT. Tsutsui, Yogyo-Kyokai-Shi J. Ceram. Soc. Jpn 94 (1986) 66.
S. Naka, H. Itoh andT. Tsutsui,J. Mater. Sci. 22 (1987) 1081.
A. Tsuzuki, S. Hirano andS. Naka,ibid 19 (1984) 1153.
Idem, ibid 20 (1985) 2260.
S. Naka, A. Tsuzuki andS. Hirano,ibid 19 (1984) 259.
S. Naka, H. Itoh, S. Tajima, H. Hamamoto andT. Matsudaira, Funtai Oyobi Funmatsu-Yakin (J. Jpn Soc. Powder & Powder Metallurgy) 34 (1984) in press.
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Naka, S., Itoh, H. & Tsutsui, T. Reaction sintering of diamond using a binary solvent-catalyst of the Fe-Ti system. J Mater Sci 22, 1753–1757 (1987). https://doi.org/10.1007/BF01132403
- Reaction Time
- High Pressure