High Temperature Alkali Corrosion of Dense SiC and Si(3)N(4) Coated with CMZP and Mg-Doped Al(2) TiO(5) in Coal Gas.

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Hot pressed Si{sub 3}N{sub 4} has been extensively studied in the past years mainly because it is a potential candidate for high temperature structural applications. If its behavior in alkaline environments has been widely investigated and is now well understood, only a few authors have conducted research on thin film to enhance Si{sub 3}N{sub 4} lifetime in harsh environments. Thus, it is the first objective of this work to develop thin film of CMZP and Mg doped Al{sub 2}TiO{sub 5} using the sol-gel process and the dip coating technique. In the previous report relatively good coverage of the substrate surface ... continued below

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13 p.

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Thieny, N. & Brown, J. J. July 1, 1997.

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Description

Hot pressed Si{sub 3}N{sub 4} has been extensively studied in the past years mainly because it is a potential candidate for high temperature structural applications. If its behavior in alkaline environments has been widely investigated and is now well understood, only a few authors have conducted research on thin film to enhance Si{sub 3}N{sub 4} lifetime in harsh environments. Thus, it is the first objective of this work to develop thin film of CMZP and Mg doped Al{sub 2}TiO{sub 5} using the sol-gel process and the dip coating technique. In the previous report relatively good coverage of the substrate surface was achieved with low concentration solutions and double coatings. However, the aggregation of the sol-gel at the bottom of some samples suggested that more viscous sol-gels, i.e. higher concentrations, could alleviate this phenomenon. This report will therefore present the results obtained with more concentrated solutions and also those obtained with two other CMZP solutions utilizing different precursors.

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13 p.

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OSTI as DE98051695

Other: FDE: PDF; PL:

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  • Other Information: PBD: 1 Jul 1997

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  • Other: DE98051695
  • Report No.: DOE/PC/94224--T13
  • Grant Number: FG22-94PC94224
  • DOI: 10.2172/599006 | External Link
  • Office of Scientific & Technical Information Report Number: 599006
  • Archival Resource Key: ark:/67531/metadc693142

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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 10, 2017, 1:28 p.m.

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Thieny, N. & Brown, J. J. High Temperature Alkali Corrosion of Dense SiC and Si(3)N(4) Coated with CMZP and Mg-Doped Al(2) TiO(5) in Coal Gas., report, July 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc693142/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.