Atomic partitioning of platinum and ruthenium in advanced single crystal Ni-based superalloys

被引：6
|
作者：
Tin, S. [1 ]
Zhang, L. [2 ]
Ofori, A. P. [2 ]
Miller, M. K. [3 ]
机构：
[1] IIT, Dept Mech Mat & Aerosp Engn, Chicago, IL 60616 USA
[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 1TN, England
[3] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA
来源：
2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM | 2007年 / 546-549卷
关键词：
single crystal; superalloy; partitioning; platinum; Ruthenium and atom probe;
D O I：
10.4028/www.scientific.net/MSF.546-549.1187
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The elemental partitioning characteristics of advanced single crystal Ni-base superalloys containing additions of both Pt and Ru have been investigated using atom probe tomography. Detailed microanalysis revealed Ru additions partitioned preferentially to the disordered matrix, whereas Pt additions tended to partition to the ordered intermetallic gamma' precipitates. The partitioning characteristics of three nominally similar alloys with systematic variations in the levels of Cr, Ru and Pt were investigated. For this particular set of experimental alloys, minor changes in the partitioning characteristics of the constituent elements could be attributed to additions of Cr and Ru. The preferential site occupancy of Pt within the L1(2) lattice was also statistically quantified with ALCHEMI (atomic site location by channelling enhanced microanalysis). In contrast to the atomic partitioning characteristics of Ru, Pt exhibited a tendency to occupy the Ni sublattice sites in the gamma' structure.
引用
收藏
页码：1187 / +
页数：2
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