Development of a database for the prediction of phases in Pt-based Superalloys:Cr-Pt-Ru  

作　　者：A.Watson L.A.Cornish R.Süss 

机构地区：[1]Institute for Materials Research,School of Process,Materials and Environmental Engineering,University of Leeds,Leeds,UK [2]Advanced Materials Division,Mintek,Private Bag X3015,Randburg,2125,South Africa,DST/NRF Centre of Excellence for Strong Materials,University of the Witwatersrand,Johannesburg,2025,South Africa [3]Advanced Materials Division,Mintek,Private Bag X3015,Randburg,2125,South Africa,DST/NRF Centre of Excellence for Strong Materials,University of the Witwatersrand,Johannesburg,2025,South Africa ,School of Chemical and Metallurgical Engineering,University of the Witwatersrand,Johannesburg,2025,South Africa

出　　处：《Rare Metals》2006年第5期597-607,共11页稀有金属（英文版）

基　　金：The work was financially supported by EPSRC platform grant GR/R95798, "The Platinum Development Initiative", and the Department of Science and Technology, South Africa

摘　　要：Work has been ongoing in building a thermodynamic database for the prediction of phase equilibria in Pt-based superalloys. The alloys are being developed for high texture applications in aggressive environments. The database will aid the design of alloys by enabling the calculation of the composition and proportions of phases present in alloys of different compositions. In order to extend this database, a preliminary assessment of the Cr-Pt-Ru system has been undertaken, using a combination of Pandat and MTDATA software. As a first step, it was necessary to provide thermodynamic models for the three associated binary systems. Owing to a lack of thermodynamic information for these systems, the binary assessments were based on phase diagrams available in the literature. Using recent experimental phase equilibria data for the ternary system, a preliminary assessment of the Cr-Pt-Ru system has been produced. In this preliminary assessment, simplified models were employed for the L12 and sigma phases with a view to extending the descriptions as new experimental information becomes available.Work has been ongoing in building a thermodynamic database for the prediction of phase equilibria in Pt-based superalloys. The alloys are being developed for high texture applications in aggressive environments. The database will aid the design of alloys by enabling the calculation of the composition and proportions of phases present in alloys of different compositions. In order to extend this database, a preliminary assessment of the Cr-Pt-Ru system has been undertaken, using a combination of Pandat and MTDATA software. As a first step, it was necessary to provide thermodynamic models for the three associated binary systems. Owing to a lack of thermodynamic information for these systems, the binary assessments were based on phase diagrams available in the literature. Using recent experimental phase equilibria data for the ternary system, a preliminary assessment of the Cr-Pt-Ru system has been produced. In this preliminary assessment, simplified models were employed for the L12 and sigma phases with a view to extending the descriptions as new experimental information becomes available.

关 键 词：Cr-Pt-Rh THERMODYNAMICS assessment phase diagram 

分 类 号：TG132[一般工业技术—材料科学与工程]