Accession Number : AD0739862

Title :   Investigation of the Behavior of High Temperature Materials.

Descriptive Note : Final rept. Jul 68-Jul 71,

Corporate Author : SYSTEMS RESEARCH LABS INC DAYTON OHIO

Personal Author(s) : Tripp,Walter C. ; Rodine,Edward T. ; Stroud,John E.

Report Date : OCT 1971

Pagination or Media Count : 254

Abstract : The report summarizes investigations of selected materials in three principal areas: Defect structure of metal oxides at high temperatures; Thermoluminescence of doped and undoped ThO2 and; Oxidation of high-temperature materials. Extensive defect structure investigations, including weight and conductivity measurements, were performed on NiO and Sc2O3 and the results are presented with a discussion of relevant defect models. Detailed conductivity measurements on CoO were also made. In addition, conductivity data for 76% CeO2 - 20% ZrO2 4% Y2O3 are presented. The UV excited thermoluminescence of over 40 single crystals of undoped and rare earth doped ThO2 was measured. Presented here is a summary of the major conclusions of this investigation. The oxidation program concentrated on two materials - ZrB2 and ZrB2+20 v/o SiC. Data is also presented on the effect of surface preparation methods on the oxidation of Ti-6A1-4V at 700C. In addition, oxidation data on several Ni-Cr-Y alloys (1000-1200C) is included. (Author)

Descriptors :   (*HEAT RESISTANT MATERIALS, *OXIDATION), (*THERMOLUMINESCENCE, THORIUM COMPOUNDS), (*OXIDES, *CRYSTAL DEFECTS), ELECTRICAL CONDUCTIVITY, NICKEL COMPOUNDS, SCANDIUM COMPOUNDS, COBALT COMPOUNDS, MIXTURES, ZIRCONIUM OXIDES, YTTRIUM COMPOUNDS, CERIUM COMPOUNDS, BORIDES, ZIRCONIUM COMPOUNDS, SILICON CARBIDES, TITANIUM ALLOYS, NICKEL ALLOYS, SURFACES, ELECTRON MICROSCOPY, THERMOGRAVIMETRIC ANALYSIS

Subject Categories : Physical Chemistry
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE