Download or read book High Temperature Alkali Corrosion of Dense SiC and Si3N4 Coated with CMZP and Mg doped Al2TiO5 in Coal Gas Quarterly Progress Report No 7 January 1 1996 March 31 1996 written by and published by . This book was released on 1996 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective is to apply CMZP and Mg-Al2TiO5 as coatings to SiC to improve corrosion resistance under coal combustion atmospheres as well as to improve high temperature mechanical properties. The research will also study the mechanism of coal combustion corrosion of SiC at 1000-1400 C. 16 figs, 8 tabs.
Download or read book 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 written by and published by . This book was released on 1997 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hot pressed Si3N4 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 Si3N4 lifetime in harsh environments. Thus, it is the first objective of this work to develop thin film of CMZP and Mg doped Al2TiO5 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.
Download or read book Alkali steam Corrosion Resistance of Commercial SiC Products Coated with Sol gel Deposited Mg doped Al2TiO5 and CMZP written by Min Kang and published by . This book was released on 1994 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Temperature Alkali Corrosion of Ceramics in Coal Gas Quarterly Progress Report No 5 September 1 1992 December 1 1992 written by and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calcia-stabilized cubic zirconia was mixed with soda, then fired at 840-1100 C. SiC was also reacted with alkali-containing atmosphere at 1000 C.
Download or read book High Temperature Alkali Corrosion of Ceramics in Coal Gas written by and published by . This book was released on 1994 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are several ceramic materials which are currently being considered for use as structural elements in coal combustion and coal conversion systems because of their thermal and mechanical properties. These include alumina (refractories, membranes, heat engines); silicon carbide and silicon nitride (turbine engines, internal combustion engines, heat exchangers, particulate filters); zirconia (internal combustion engines, turbine engines, refractories); and mullite and cordierite (particulate filters, refractories, heat exchangers). High temperature alkali corrosion has been known to cause premature failure of ceramic components used in advanced high temperature coal combustion systems such as coal gasification and clean-up, coal fired gas turbines, and high efficiency heat engines. The objective of this research is to systematically evaluate the alkali corrosion resistance of the most commonly used structural ceramics including silicon carbide, silicon nitride, cordierite, mullite, alumina, aluminum titanate, and zirconia. The study consists of identification of the alkali reaction products and determination of the kinetics of the alkali reactions as a function of temperature and time. 145 refs., 29 figs., 12 tabs.
Download or read book High Temperature Alkali Corrosion of Ceramics in Coal Gas written by and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calcia-stabilized cubic zirconia was mixed with soda, then fired at 840-1100 C. SiC was also reacted with alkali-containing atmosphere at 1000 C.
