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2011-06-30T14:59:52Z 2011-06-30T14:59:52Z 10000-01-01 1978 Lazarus, David Pontau, Arthur Erwin The diffusion coefficients for titanium and niobium radioactive tracers were simultaneously measured in Ti, Ti94.6, Ti80.4, Nb19.6 and Ti64.3Nb35.7 over the temperature range from 9S0°C to 1511°C using 643 3S standard lathe sectioning techniques. The samples were initially heat treated by annealing above the a-B phase transition temperature and then either cooling slowly to room temperature or quenching. The room temperature crystal morphology was then examined using x-ray diffraction. Alloy concentrations were chosen both to suppress the B-a transition and to obtain the metastable w-phase. [DATA]The hypothesized enhancement of diffusion by w-phase fluctuations or effects of the h.c.p. to b.c.c. phase transformation cannot be ruled out by this work, but are certainly not supported directly by the present results. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T14:59:52Z No. of bitstreams: 1 1978_pontau.pdf: 2019782 bytes, checksum: cbe01dcb5b568ade69ca3d1f172dc02d (MD5) Made available in DSpace on 2011-06-30T14:59:52Z (GMT). No. of bitstreams: 1 1978_pontau.pdf: 2019782 bytes, checksum: cbe01dcb5b568ade69ca3d1f172dc02d (MD5) Previous issue date: 1978 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T14:59:52Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:26-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 356013 http://hdl.handle.net/2142/25594 en 1978 Arthur Erwin Pontau titanium niobium bcc alloys diffusion coefficients lathe sectioning techniques Diffusion of titanium and niobium in b.c.c. Ti-Nb alloys Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.