ISSN:
1013-9826
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:
Laser cladding technique was used to form Ni3(Si,Ti) intermetallic coating by Nb additionon Ni-based superalloy substrate. The coating was investigated by optical microscopy and X-raydiffraction (XRD). The clad coating was dense, compact and smooth. An excellent bonding betweenthe coating and the substrate was ensured by a strong metallurgical interface. Ni3(Si,Ti) phase wasdetected in all of the claddings, and NbNi3, Nb3Ni2Si were detected in Nb additional experiments. Thepeaks intensity of Nb3Ni2Si and NbNi3 increased with the increasing of Nb content. The Ni3Nb andNb3Ni2Si were formed when Nb was beyond its solubility in the L12 Ni3(Si,Ti). The averagemicrohardness of the coating was improved with the increasing of the Nb content. The microhardnesswas up to 530Hv when the atom percentage of Nb addition reached 5%, and it was much greater thanthat of Ni-based superalloy substrate
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1716.pdf
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