Accession Number : ADA117845

Title :   Fundamental Research Directed to Advanced High Temperature Coating Systems Beyond the Current State-of-the-Art Systems.

Descriptive Note : Annual rept. no. 2, 1 Jan-31 Dec 81,

Corporate Author : PITTSBURGH UNIV PA DEPT OF METALLURGICAL AND MATERIALS ENGINEERING

Personal Author(s) : Meier,G H ; Pettit,F S

PDF Url : ADA117845

Report Date : 01 Apr 1982

Pagination or Media Count : 12

Abstract : The oxidation behavoir of Ni-7.5 Si alloys has been studied in oxygen over the temperature range from 950 to 1150 deg C. The alloys exhibit significant transient oxidation but following this period oxidize at rates which are similar to those for A1203-forming systems. This slow rate is apparently due to the formation of sealing layer of Si02 at the alloy/scale interface. The sealing layer appears to be slightly permeable to Ni which results in continued formation of Ni0 at the scale gase interface.

Descriptors :   *Coatings, *Metal coatings, Nickel alloys, Silicon alloys, Oxidation, High temperature, State of the art, Ion implantation, Adhesion, Cracking(Fracturing), Spallation, Morphology, Reaction kinetics, Surface finishing, X ray diffraction, Spectrum analysis, Test and evaluation

Subject Categories : Coatings, Colorants and Finishes
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE