Effect of scandia content on the thermal shock behavior of SYSZ thermal sprayed barrier coatings

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• 作者：M.R. Loghman-Estarki^a ; ^{loghman57@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; R. Shoja Razavi^a ; ^{shoja_r@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; H. Jamali^a ; R. Ashiri^b
• 关键词：Thermal shock resistance ; Atmospheric plasma spraying ; Nanostructured thermal barrier coatings
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：42
• 期：9
• 页码：11118-11125
• 全文大小：4798 K

文摘

Nanostructured 4SYSZ (scandia (3.5 mol%) yttria (0.5 mol%) stabilized zirconia) and 5.5 SYSZ (5 mol% scandia and 0.5 mol% yttria) thermal barrier coatings (TBCs) were deposited on nickel-based superalloy using NiCrAlY as the bond coat by plasma spraying process. The thermal shock response of both as-sprayed TBCs was investigated at 1000 °C. Experimental results indicated that the nanostructured 5.5SYSZ TBCs have better thermal shock performance in contrast to 4SYSZ TBCs due to their higher tetragonal phase content and higher fracture toughness of this coating