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ELEVATED TEMPERATURE STRENGTHENING OF MELT-GROWN SAPPHIRE BY ALLOYING.

Publication ,  Journal Article
Hurley, GF; Labelle, HE; Mitchell, CR; Cocks, FH
Published in: Appl Polym Symp
January 1, 1975

Rods and monocrystalline filaments of both chromia doped and pure Al//2O//3 have been produced by edge-defined, film-fed growth (EFG). Rhenium dies and crucibles were found to be effectively resistant to the reaction with chromium containing melts. Al//2O//3 alloy crystals containing up to 1. 5 wt. % Cr//2O//3 have been grown by this process. In the case of pure Al//2O//3, tensile tests made at temperatures between 1650 and 2020 degree C show that a-axis filaments show substantially different mechanical behavior than the c-axis filaments at the highest temperatures. At 2000 degree C both orientations show significant ductility, but the a-axis orientation shows a 30% elongation compared to a more limited 1% for the c-axis orientation. The high temperature strengthening effect of Cr//2O//3 was found to be substantial, provided such doping could be produced without the concomitant production of a voided structure.

Duke Scholars

Published In

Appl Polym Symp

Publication Date

January 1, 1975

Issue

29

Start / End Page

131 / 149
 

Citation

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Hurley, G. F., Labelle, H. E., Mitchell, C. R., & Cocks, F. H. (1975). ELEVATED TEMPERATURE STRENGTHENING OF MELT-GROWN SAPPHIRE BY ALLOYING. Appl Polym Symp, (29), 131–149.
Hurley, G. F., H. E. Labelle, C. R. Mitchell, and F. H. Cocks. “ELEVATED TEMPERATURE STRENGTHENING OF MELT-GROWN SAPPHIRE BY ALLOYING.Appl Polym Symp, no. 29 (January 1, 1975): 131–49.
Hurley GF, Labelle HE, Mitchell CR, Cocks FH. ELEVATED TEMPERATURE STRENGTHENING OF MELT-GROWN SAPPHIRE BY ALLOYING. Appl Polym Symp. 1975 Jan 1;(29):131–49.
Hurley, G. F., et al. “ELEVATED TEMPERATURE STRENGTHENING OF MELT-GROWN SAPPHIRE BY ALLOYING.Appl Polym Symp, no. 29, Jan. 1975, pp. 131–49.
Hurley GF, Labelle HE, Mitchell CR, Cocks FH. ELEVATED TEMPERATURE STRENGTHENING OF MELT-GROWN SAPPHIRE BY ALLOYING. Appl Polym Symp. 1975 Jan 1;(29):131–149.

Published In

Appl Polym Symp

Publication Date

January 1, 1975

Issue

29

Start / End Page

131 / 149