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Thermal barrier coating (TBC) with Al2O3 and 8YSZ as topcoat constituents has been developed. The commercially available 8YSZ (80% wt.), Al2O3 (17 and 19% wt.) and multiwall carbon nanotubes (MWCNT) (3% and 1% wt.) were plasma sprayed to produce composite coatings. A stress relaxation technique using a slow-speed diamond cutter has been used to relax the strain and determine the through-thickness residual stress in the coatings. A 3D finite element model was developed, the model was experimentally validated, and the model was used to establish a relationship between applied stress and relaxed strain. The addition of alumina increased the compressive residual stress on the surface of the coating by 42%, the addition of 1% MWCNT had a negligible effect on the residual stress on the coating surface. The further addition of MWCNT (3% wt.) resulted in tensile residual stress in the coating as a result of MWCNT agglomeration.
Czasopismo
Rocznik
Tom
Strony
1--15
Opis fizyczny
Bibliogr. 44 poz., fot., rys., wykr.
Twórcy
autor
- School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
autor
- Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Uttarakhand 247667, India
autor
- School of Mechanical Science, Indian Institute of Technology Bhubaneswar, Odisha 751013, India
Bibliografia
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- [40] Widjaja S, Limarga AM, Yip TH. Modeling of residual stresses in a plasma-sprayed zirconia/alumina functionally graded-thermal barrier coating. Thin Solid Films. 2003. https ://doi.org/10.1016/S0040 -6090(03)00427 -9.
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- [42] Bhattacharyya A, Maurice D. Residual stresses in functionally graded thermal barrier coatings. Mech Mater. 2018;129:50–6. https ://doi.org/10.1016/j.mechm at.2018.11.002.
- [43] Ojha S, Thakare JG, Giri A, Pandey C, Mahapatra MM, Mulik RS. Experimental and numerical investigation of residual stress in coatings on steel. J Test Eval. 2020;48:20180247. https ://doi.org/10.1520/jte20 18024 7.
- [44] Peter Worth AW. Residual stress measurement and the slitting method. New York: Springer; 2007. https ://doi.org/10.1007/978-0-387-39030 -7.
Uwagi
PL
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-c51cacb3-6f42-40da-b650-8309105f812b