Racek, O., Berndt, C.C., Guru, D., and Heberlein, J. (2005) Microstructural observation of the sintering behavior of nanostructured yttria stabilized zirconia. In: Proceedings of International Thermal Spray Conference & Exposition. From: International Thermal Spray Conference & Exposition, 2-4 May 2005, Basel, Switzerland.

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Abstract

Multilayer thermal barrier coatings are being investigated for high temperature applications by employing a strain accommodating interlayer. Plasma sprayed coatings of nanostructured feedstock have shown promise in this direction. Layers of nanostructured yttria stabilized zirconia (nano-YSZ) and conventional YSZ were deposited on mullite substrates using the triple torch plasma reactor (TTPR), and on NiCrAIY coated steel substrates using the Praxair SG-100 plasma torch. The coatings were heat treated and the microstructure evaluated. Heat treating the samples lead to the formation of larger pores with a significant proportion of partially molten particles. The porosity evolved from the partial sintering of the nano -agglomerates. Porosity change during the sintering process was measured and the microstructure observed using electron microscopy. The nanostructured coatings were compared to conventional YSZ coatings.

Item ID:	14823
Item Type:	Conference Item (Research - E1)
ISBN:	978-3-87155-793-4
Keywords:	fracture mechanisms; microstructure; nanomaterials; process parameters; thermal spray
Related URLs:	http://www.asminternational.org/content/...
Date Deposited:	28 Nov 2010 23:41
FoR Codes:	09 ENGINEERING > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified @ 45% 09 ENGINEERING > 0901 Aerospace Engineering > 090103 Aerospace Structures @ 30% 09 ENGINEERING > 0912 Materials Engineering > 091202 Composite and Hybrid Materials @ 25%
SEO Codes:	86 MANUFACTURING > 8610 Ceramics, Glass and Industrial Mineral Products > 861002 Ceramics @ 70% 86 MANUFACTURING > 8613 Transport Equipment > 861301 Aerospace Equipment @ 30%
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