The Ternary System Nickel/Silicon/Titanium Revisited

Zeitschrift fur Anorganische und Allgemeine Chemie - Tập 636 Số 6 - Trang 982-990 - 2010
F. Weitzer1, Masaaki Naka2, Nataliya Krendelsberger3,1, Frank Stein4, Cuiyun He4,5, Yong Du1,5, Julius C. Schuster1
1Innovative Materials Group,Universität Wien,Währinger Str. 42,1090 Wien, Austria
2Joining and Welding Research Institute,Osaka University,11–1 Mihogaoka,Ibaraki 567, Osaka, Japan
3CEST-Center of Electrochemical Surface Technology,Viktor Kaplan Str.2,2700 Wiener Neustadt, Austria
4Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
5State Key Lab for Powder Metallurgy,Central South University,410083 Changsha,Hunan, P.R.China

Tóm tắt

AbstractThe constitution of the ternary system Ni/Si/Ti is investigated over the entire composition range using X‐ray diffraction (XRD), energy dispersive X‐ray spectroscopy (EDS), differential thermal analysis (DTA), and metallography. The solid state phase equilibria are determined for 900 °C. Eight ternary phases are found to be stable. The crystal structures for the phases τ1NiSiTi, τ2Ni4Si7Ti4, τ3Ni40Si31Ti13, τ4Ni17Si7Ti6, and τ5Ni3SiTi2 are corroborated. For the remaining phases the compositions are determined as Ni6Si41Ti53 (τ6), Ni16Si42Ti42(τ7), and Ni12Si45Ti43 (τ8). The reaction scheme linking the solid state equilibria with the liquidus surface is amended to account for these newly observed phases. The discrepancies between previous experimental conclusions and modeling results are addressed. The liquidus surface is dominated by the primary crystallisation field of τ1NiSiTi, the only congruently melting phase.

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Zeitschrift fur Anorganische und Allgemeine Chemie

Tập 636 Số 6

982-990

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