Thermophysical properties of selected powders for thermal barrier coatings

• Autorzy: Drajewicz, M. , Góral, M. , Pytel, M. , Sieniawski, J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Plasma-sprayed thermal barrier coatings often have the problems of spallation and cracking in service owing to their poor bond strength and high residual stresses. Functionally graded thermal barrier coatings with a gradual compositional variation from heat resistant ceramics to fracture-resistant metals are proposed to mitigate these problems. Design/methodology/approach: The results of measurements of thermal diffusivity by using one of the most modern experimental sets LFA 427 (Laser Flash Apparatus) produced by Netzsch Company. In order to measure the specific heat cp(T) and density p(T), two methods of termogravimetry analysis were used STA 449 Jupiter F3 Netzsch Company and gas displacement density analyzer AccuPyc II 1340 Micromeritics Company. Research limitations/implications: This paper presents the results of measurements of thermal diffusivity coefficient as a function of temperature for Sulzer powders, AMDRY 997, AMDRY 365C, METCO 45C NS, METCO 202 NS, METCO 204 NS. Practical implications: Optimal technical and technological parameters of powders for thermal barrier coatings have been selected. Originality/value: The presented method undoubtedly develops new possibilities for thermal barrier coatings.

Słowa kluczowe

EN

thermal barrier coatings; ceramics; powder; laser flash apparatus; density; thermal diffusivity

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 902--906
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Drajewicz, M.

• The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstanców Warszawy 12, 35-959 Rzeszów, Poland,

autor

Góral, M.

• The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstanców Warszawy 12, 35-959 Rzeszów, Poland

autor

Pytel, M.

• The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstanców Warszawy 12, 35-959 Rzeszów, Poland

autor

Sieniawski, J.

• The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstanców Warszawy 12, 35-959 Rzeszów, Poland

Bibliografia

• [1] A. Feuerstein, J. Knapp, T. Taylor, A. Ashary, A. Bolcavage, N. Hitchman, Technical and economical aspects of current thermal barrier coating systems for gas turbine engines by thermal spray and EBPVD, A review, Journal of Thermal Spray Technology 17/2 (2007) 199-213.
• [2] X.Q. Cao, R. Vassen, D. Stoever, Ceramic materials for thermal barrier coatings, Journal of the European Ceramic Society 24 (2004) 1-10.
• [3] R. Vaßen, M.O. Jarligo, T. Steinke, D.E. Mack, D. Stover, Overview on advanced thermal barrier coatings, Surface and Coatings Technology 205 (2010) 938- 942.
• [4] C.G. Levi, Emerging materials and processes for thermal barrier systems, Current Opinion in Solid State and Materials Science 8 (2004) 77-91.
• [5] S.A. Tsipas, Effect of dopants on the phase stability of zirconia-based plasma sprayed thermal barrier coatings, Journal of the European Ceramic Society 30 (2010) 61-72.
• [6] A.N. Khan, S.H. Khan, F. Ali, M.A. Iqbal, Evaluation of ZrO2-24MgO ceramic coating by eddy current method, Computational Materials Science 44 (2009) 1007-1012.
• [7] http://www.netzsch-thermal-analysis.com.