| AVS 57th International Symposium & Exhibition | |
| Advanced Surface Engineering | Tuesday Sessions |
| Session SE-TuM |
| Session: | Hard and Nanostructured Coatings |
| Presenter: | M. Noor-A-Alam, University of Texas at El Paso |
| Authors: | M. Noor-A-Alam, University of Texas at El Paso C.K. Roy, University of Texas at El Paso C.M. Bradely, University of Texas at El Paso A.R. Choudhuri, University of Texas at El Paso C.V. Ramana, University of Texas at El Paso |
| Correspondent: | Click to Email |
The aim of this work is to develop nano-structured Hafnia-based coating which can withstand with high temperature environment. Yttria stabilized hafnia (YSH) coatings have been fabricated on Nickel-based super alloy Inconel-738 and stainless steel using PVD method. The coatings have been produced at various temperatures. The thickness of the coating was about 500 nm as demonstrated in the cross-sectional imaging by Scanning Electron Microscopy (SEM). The structural characterization performed by X-ray diffraction (XRD) indicates the cubic crystal structure of YSH coating. Columnar structure has been noticed in all the coatings. The microhardness investigated by using a diamond tip microhardness testing machine indicates 3 Gpa hardness coatings. The temperature stability of these coatings has been examined. The reesult will be discussed in detail.