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Licensed Unlicensed Requires Authentication Published by De Gruyter October 16, 2013

Experimental investigation of phase equilibria in the Co–Cr–W ternary system

Xinqiao Zhang , Shuiyuan Yang , Cancan Zhao , Yong Lu , Xingjun Liu and Cuiping Wang


The phase equilibria in the Co–Cr–W ternary system were experimentally investigated by using optical microscopy, electron probe microanalysis and X-ray diffraction on equilibrated alloys. In this study, isothermal sections of the Co–Cr–W ternary system at 1000°C, 1100°C and 1200°C were determined. The intermetallic compound R phase with its composition region were determined in the isothermal section at 1200°C, whereas it was absent at 1000°C and 1100°C. The Co7W6 phase was found to possess a large solubility of Cr. The trapezoid-shaped composition region of σ phase was determined from 1000°C to 1200°C in the present work. The newly determined phase equilibria of the Co–Cr–W in the present study will provide useful information for Co-based alloys and Co–W base cemented carbides.

* Correspondence address, Prof. Cuiping Wang, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, P.R. China, Tel.: +86-592-2180606, Fax: +86-592-2187966, E-mail:


[1] N.Gibson, H.Stamm, in: E.Cooper (Ed.), Business Briefing, Medical Device Manufacturing & Technology, World Markets Research Centre (2002) 4851. PMid:11880977Search in Google Scholar

[2] B.D.Ratner, A.S.Hoffman, F.J.Schoen, J.E.Lemons: Biomaterials Science, An Introduction to Materials in Medicine, Academic Press, New York (2004) 526555.Search in Google Scholar

[3] P.H.Long: Toxicologic Pathology36 (2008) 8591. PMid:18337225 10.1177/0192623307310951Search in Google Scholar

[4] D.O.Northwood: Mater. Design6 (1985) 58. 10.1016/0261-3069(85)90165-7Search in Google Scholar

[5] F.B.Pickering: Physical Metallurgy and the Design of Steels, Applied Science Publishers, Essex, UK (1978) 226.Search in Google Scholar

[6] L.Q.Shi, D.O.Northwood, Z.W.Cao: J. Mater. Sci.28 (1993) 13121316. 10.1007/BF00351224Search in Google Scholar

[7] S.S.K.Balam, A.Paul: J. Mater. Sci.46 (2011) 889895. 10.1007/s10853-010-4831-7Search in Google Scholar

[8] N.G.Hashe, S.Norgren, H.-O.Andrén, J.H.Neethling, P.R.Berndt: Int. J. Refract. Met. Hard Mater.27 (2009) 2025. 10.1016/j.ijrmhm.2008.01.014Search in Google Scholar

[9] A.Kusoffsky, B.Jansson: Calphad21 (1997) 321333. 10.1016/S0364-5916(97)00033-3Search in Google Scholar

[10] R.Liu, S.Q.Xi, S.Kapoor, X.J.Wu: J. Mater. Sci.45 (2010) 62256234. 10.1007/s10853-009-3915-8Search in Google Scholar

[11] S.V.N.Naidu, A.M.Sriramamurthy, P.R.Rao: J. Alloy Phase Diagrams2 (1986) 4352.Search in Google Scholar

[12] K.Ishida, T.Nishizawa: Bull. Alloy Phase Diagrams11 (1990) 357370. 10.1007/BF02843315Search in Google Scholar

[13] S.V.N.Naidu, A.M.Ariramamurthy, P.R.Rao: Bull. Alloy Phase Diagrams5 (1984) 289292. 10.1007/BF02868555Search in Google Scholar

[14] R.G.Barrows, J.B.Newkirk: Metallography5 (1972) 515541. 10.1016/0026-0800(72)90041-9Search in Google Scholar

[15] J.Sato: Thermodynamic database of Co-based system, Sendai: Department of Materials, Graduate School of Engineering, Tohoku University, Japan (2007) 108110.Search in Google Scholar

[16] S.Y.Yang, M.Jiang, H.X.Li, L.Wang: Trans. Nonferrous Met. Soc. China21 (2011) 22702275. 10.1016/S1003-6326(11)60696-1Search in Google Scholar

Received: 2012-11-11
Accepted: 2013-3-7
Published Online: 2013-10-16
Published in Print: 2013-09-12

© 2013, Carl Hanser Verlag, München

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