✦ LIBER ✦
Bulk self-diffusion of Hf181 in monocrystalline alpha hafnium-2.1% zirconium
✍ Scribed by B.E Davis; W.D McMullen
- Publisher
- Elsevier Science
- Year
- 1972
- Weight
- 862 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0001-6160
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✦ Synopsis
Coefftcients for the diffusion of Hf rsr (43 day half-life, mein gamma peak at 482 keV) were measured in the [OOOI] and [1 lZO] directions in oriented single crystals of h.c.p. Hf-2.1 wt. % Zr over a temperature range of 1.0X-1610°C.
A lathe sectioning technique was used in conjunction with the thin&m solution. Self-diffusion coefficients at temperatures between 1220 and 1610°C for diffusion parallel and perpendicular to the c axis, respectively, may be expressed as follows: Dlfc = 0.86 exp [( -88,400 + 3200)/Rq cm2/sec Dlt = 0.28 exp [( -83,200 f ~S~)~R~] cm2fseo *