Chemical interaction between Ba-celsian (BaAl₂Si₂O₈) and molten aluminum

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• 作者：M.N. Ibarra C^b ; ^{marcelanohemi@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{marcela.ibarra@comimsa.com" class="auth_mail" title="E-mail the corresponding author} ; J.M. Almanza R^a ; ^{manuel.almanza@cinvestav.edu.mx" class="auth_mail" title="E-mail the corresponding author} ; D.A. Corté ; s H^a ; ^{dora.cortes@cinvestav.edu.mx" class="auth_mail" title="E-mail the corresponding author} ; J.C. Escobedo B^a ; ^{jose.escobedo@cinvestav.edu.mx" class="auth_mail" title="E-mail the corresponding author} ; R. Martí ; nez-Ló ; pez^a ; ^{ricardo.mtzl@cinvestav.edu.mx" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Wetting (C) ; Corrosion (C) ; Mullite (D) ; BaAl2Si2O8 (D)
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 February 2016
• 年：2016
• 卷：42
• 期：2
• 页码：3491-3496
• 全文大小：1243 K

文摘

Wetting and corrosion experiments by molten aluminum were performed on mullite and Ba-celsian (BaAl₂Si₂O₈) substrates. The BaAl₂Si₂O₈ was synthesized from a mixture of alumina, silica and barium carbonate at 1450 °C for 10 h. The formation of pure BaAl₂Si₂O₈ was corroborated by X-Ray Diffraction analysis. Corrosion tests were performed by an immersion test of samples in molten pure aluminum or 319.0 alloy at 900 °C for 24 h. The wetting angles were measured using the sessile droop test at 900 °C for 2 h using the same Al alloys. The mullite sample showed a severe corrosion after the test, while the BaAl₂Si₂O₈ sample showed a corrosion layer of about 100 μm. The wetting angles were 109° and 127° for mullite in contact with pure Al and 319.0 alloy, respectively, while for BaAl₂Si₂O₈ were 153° and 149°, showing a no wetting behavior.