Accession Number : AD0455770


Title :   INVESTIGATION OF BONDING IN OXIDE-FIBER (WHISKER) REINFORCED METALS.


Descriptive Note : Final technical rept., 1 Jul 62-30 Jun 64,


Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV


Personal Author(s) : Sutton, Willard H


Report Date : 30 Jun 1964


Pagination or Media Count : 40


Abstract : The effects of various additives to nickel on its wetting, its interfacial energy and its adherence to sapphire (alpha-Al2O3) were investigated by preparing special binary alloys containing one atomic percent of Al, Cu, In, Ti, Zr and Cr. Sessile drop experiments were conducted in vacuo (5 x 0.000,001 Torr) at 1470 to 1550 C in order to observe the contact angles and the degree of wetting. Only the nickel drops containing Ti, Zr, and Cr showed evidence of pronounced chemical reaction with the sappire substrates. These same compositions had the most significant effects on contact angle and interfacial energy. Shear tests were conducted on solidified sessile drops of nickel and nickel alloys, and shear stresses as high as 25,000 psi were recorded. It is concluded that high strengths between metal and oxide systems can be achieved by optimization of the compositions and chemical reactions of the interfacially active elements. (Author)


Descriptors :   *FIBER METALLURGY , *COMPOSITE MATERIALS , CERAMIC FIBERS , BONDING , NICKEL , SAPPHIRE , DROPS , ADHESION , SURFACE PROPERTIES , DISKS , SOLIDS , SURFACE TENSION , CHROMIUM ALLOYS , ZIRCONIUM ALLOYS


Distribution Statement : APPROVED FOR PUBLIC RELEASE