Accession Number : ADA293739

Title :   Novel Reagents for Chemical Vapor Deposition of Intermetallic Alloys.

Descriptive Note : Final rept. Apr 91-Aug 94,

Corporate Author : NORTHEASTERN UNIV BOSTON MA

Personal Author(s) : Kirss, Rein U. ; Feighery, William ; Kreisz, Jozsef ; Meda, Lamartine ; Gordon, Douglas

PDF Url : ADA293739

Report Date : 31 OCT 1994

Pagination or Media Count : 11

Abstract : Reactions of Hf(CH2SiMe3)4 with AlMe3 proceed by formation of covalently bonded heterobimetallic intermediates with no alkyl exchange. Reaction with AlH3:NMe3 yielded Al(CH2SiMe3)3. NMe3 and 'Hf(CH2SiMe3)H3'. Carbon blocks coated with this mixture produced a HfAlC2 coating which was effective in protecting the substrate from air oxidation at high temperatures. jg

Descriptors :   *CHEMICAL VAPOR DEPOSITION, *ALLOYS, *INTERMETALLIC COMPOUNDS, METALS, HAFNIUM, METHYL RADICALS, AIR, PRECURSORS, COMPOSITE MATERIALS, HIGH TEMPERATURE, COVALENT BONDS, CARBIDES, SUBSTRATES, CARBON, NITROGEN, HYDROGEN, COATINGS, OXIDATION, ALUMINUM, SILICON, CHEMICAL REACTIONS, TERNARY COMPOUNDS, EXCHANGE, MOLECULAR PROPERTIES, ALKYL RADICALS.

Subject Categories : Properties of Metals and Alloys
      Inorganic Chemistry
      Organic Chemistry
      Physical Chemistry
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE