Elemental partitioning of platinum group metal containing Ni-base superalloys using electron microprobe analysis and atom probe tomography

被引：64

作者：

Van Sluytman, J. S. ^{[1
]}

La Fontaine, A. ^{[2
]}

Cairney, J. M. ^{[2
]}

Pollock, T. M. ^{[1
]}

机构：

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[2] Univ Sydney, Electron Microscope Unit, Sydney, NSW 2006, Australia

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 06期

关键词：

Platinum group metals; Elemental partitioning; Electron microprobe analysis; Atom probe tomography; Nickel-base superalloys; SINGLE-CRYSTAL SUPERALLOYS; CYCLIC-OXIDATION BEHAVIOR; RHENIUM ADDITIONS; PHASE-EQUILIBRIA; CREEP RESISTANCE; GAMMA'-PHASE; MICROSTRUCTURE; RU; RE; STABILITY;

D O I：

10.1016/j.actamat.2009.11.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The partitioning of platinum group metal (PGM) additions in polycrystalline Ni-base superalloys has been investigated. Alloys with a baseline composition of 15Al-5Cr-1Re-2Ta-0.1 Hf (at.%) with systematic variations in Pt, Ir, Ru and W were cast and heat-treated to produce bimodal two-phase gamma-gamma' microstructures. Electron microprobe analysis was used to measure the composition of coarse gamma' particles. Selected alloys were studied using atom probe tomography. Pt and Ru weakly partition to the gamma' and gamma phases, respectively, whereas Ir partitions equally between both phases. Pt and Ru do not change partitioning behavior appreciably with additional W and Re. Interestingly, Ir lowers gamma' volume fraction and reduces partitioning of W, Re, Ru, Al and Pt. Tungsten partitioning coefficients exhibit an unusually strong temperature dependence, with increased partitioning of W to the matrix at lower temperatures. The thermodynamics of these PGM-containing systems are analyzed and the implications for partitioning are discussed. (C) 2010 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

引用

页码：1952 / 1962

页数：11

共 51 条

[11] THE CYCLIC-OXIDATION BEHAVIOR OF SEVERAL NICKEL-BASE SINGLE-CRYSTAL SUPERALLOYS WITHOUT AND WITH COATINGS [J].

GOBEL, M ;

RAHMEL, A ;

SCHUTZE, M .

OXIDATION OF METALS, 1994, 41 (3-4) :271-300

[12] α-NiPt(Al) and phase equilibria in the Ni-Al-Pt system at 1150°C [J].

Hayashi, S ;

Ford, SI ;

Young, DJ ;

Sordelet, DJ ;

Besser, MF ;

Gleeson, B .

ACTA MATERIALIA, 2005, 53 (11) :3319-3328

[13] Comparison of the cyclic oxidation behavior of β-NiAl, β-NiPtAl and γ-γ′ NiPtAl coatings on various superalloys [J].

Haynes, J. A. ;

Pint, B. A. ;

Zhang, Y. ;

Wright, I. G. .

SURFACE & COATINGS TECHNOLOGY, 2007, 202 (4-7) :730-734

[14] Structural Stability of Platinum-Group-Metal-Modified γ plus γ' Ni-Base Alloys [J].

Heidloff, A. J. ;

Van Sluytman, J. ;

Pollock, T. M. ;

Gleeson, B. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (07) :1529-1540

[15] Effects of targeted γ-Ni plus γ′-Ni3Al-based coating compositions on oxidation behavior [J].

Izumi, T. ;

Mu, N. ;

Zhang, L. ;

Gleeson, B. .

SURFACE & COATINGS TECHNOLOGY, 2007, 202 (4-7) :628-631

[16] PHASE-STABILITY IN (NI, PT)3AL ALLOYS [J].

KAMM, JL ;

MILLIGAN, WW .

SCRIPTA METALLURGICA ET MATERIALIA, 1994, 31 (11) :1461-1464

[17] Interdiffusion in the face-centred cubic phase of the Ni-Re, Ni-Ta and Ni-W systems between 900 and 1300°C [J].

Karunaratne, MSA ;

Carter, P ;

Reed, RC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 281 (1-2) :229-233

[18] Creep strengths of Ir-containing 5th generation SC superalloys [J].

Kobayashi, T ;

Harada, H ;

Osawa, M ;

Sato, A .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2005, 69 (12) :1099-1103

[19]

Murakami H, 2000, SUPERALLOYS 2000, P747, DOI 10.7449/2000/Superalloys_2000_747_756

[20] THE INFLUENCE OF COBALT, TANTALUM, AND TUNGSTEN ON THE MICROSTRUCTURE OF SINGLE-CRYSTAL NICKEL-BASE SUPERALLOYS [J].

NATHAL, MV ;

EBERT, LJ .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1985, 16 (10) :1849-1862

← 1 2 3 4 5 6 →