Diffusion of Aluminum, Magnesium, Silicon, and Zirconium in Nickel
The diffusion rates of aluminum, magnesium, silicon, and zirconium, alloyed as single additives in nickel, were measured at temperatures between 800 and 970 deg C. The method consisted of measuring the weight gain caused by surface oxidation of the additive in a wet hydrogen ambient. The surface oxides were identified by electron diffraction. Grain size was about 0.05 mm in Al-Ni, Si-Ni, and Mg-Ni but less than 10/sup -3/ mm in Zr-Ni. The composite volume and grain boundary diffusion coefficients are given by D/sub Al yields Ni/= 1.1 exp(- 59,500/RT); D/sub mg yields Ni/= 2.3 x 10/sup -5/ exp(-31,300/RT); D/sub zi yields /= 10.6 exp(-64,800/RT); D/sub Zr yields Ni/ = 1 x 10/sup -5/ exp(-26,700/ RT). Stereo and photomicrographs indicate considerable grain boundary diffusion, particularly in Mg-Ni and Zr-Ni.
- Research Organization:
- Bell Telephone Labs., Murray Hill, N.J.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-022470
- OSTI ID:
- 4212914
- Journal Information:
- Journal of Applied Physics, Vol. 30, Issue 9; Other Information: Orig. Receipt Date: 31-DEC-59; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Grain boundary and lattice diffusion of /sup 51/Cr in alumina and spinel
Cation interdiffusion and phase stability in polycrystalline tetragonal ceria-zirconia-hafnia solid solution