ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In the present study, platinum-iridium alloys (Ir = 15.8, 27.3, 36.1, 100at.%) wereelectroplated on a nickel-base single crystal superalloy TMS-82+ followed by a diffusion treatmentat 1373K for 1 h. Interdiffusion behavior between the Pt-Ir films and substrates was investigated interms of chemical composition, phase constitution and morphology. X-ray analysis revealed thatannealed specimens consisted of several fcc solid solutioned phases with various lattice parameters,together with ordered intermetallic compounds (L12-(Pt,Ni)3Al and B2-(Ir,Ni)Al), due to the inwarddiffusion of Pt and Ir from the electrodeposited films to the superalloy substrates, and the outwarddiffusion of solute elements (Ni, Al, Cr, Co) in the superalloy substrates into the films duringannealing. The depth concentration analysis indicated that the Pt-36.1Ir film effectively retarded theoutward diffusion of solute elements, especially nickel, from the substrate
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.522-523.293.pdf
