THE EFFECT OF SINGLE OXIDE ADDITIONS ON THE DEVITRIFICATION TENDENCIES OF A BARIUM-BORO-SILICATE CERAMIC COATING GLASS. Report No. 80

Technical Report · Sun Sep 01 00:00:00 EDT 1957

OSTI ID:4350106

Reschetz, R R; Bratschun, W R; Spriggs, R M; Bennett, D G

The effect of single oxide additions of calcia, titania, ceria, bismuth oxide and zinc oxide on the devitrification tendencies of a barium-boro-silicate glass was investigated. Coated specimens on type 347 stainless steel were examined by x-ray diffraction after exposures at 871 deg C for times up to 150 hours. All of the additions studied delayed to some exent the initial appearance of the devitrification products as compared to the base glass. All coatings of the ceria and zinc oxide series plus those compostions with smaller molar additions of TiO/sub 2/ and Bi/sub 2/O/sub 3/ appeared to retain their continuity and dimensional stability after 150 hours of heating at 871 deg C. Of these, the coating with 1.50 moles of ceria appeared to be the best. This coating, as well as the coating with 2.00 moles of ZnO, exhibited the least crystalline change over the 150 hours of heat treatment at 871 deg C. Powder patterns on selected coating samples revealed the existence of preferred orientation and selective crystallization at or near the coating surfaces. Although certain coatings exhibited considerable crystalline activity, they still retained continuity and stability characteristics. (auth)

• Research Organization: Illinois. Univ., Urbana
• NSA Number: NSA-12-008415
• OSTI ID: 4350106
• Report Number(s): AFOSR-TN-58-251; AD-154154
• Country of Publication: United States
• Language: English

Related Subjects

BARIUM BORIDES
BARIUM COMPOUNDS
BARIUM OXIDES
BARIUM SILICATES
BISMUTH OXIDES
BORON OXIDES
CALCIUM OXIDES
CERIUM OXIDES
COATING
CRYSTALS
DIFFRACTION
EFFICIENCY
GLASS
HEATING
HIGH TEMPERATURE
MINERALOGY, METALLURGY, AND CERAMICS
POWDERS
SILICON OXIDES
STABILITY
STAINLESS STEELS
SURFACES
TITANIUM OXIDES
X RADIATION
ZINC OXIDES