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Glancing angle X-ray techniques have been used to characterise yttrium-containing Ni-20Cr alloys during the initial stages of oxidation at 700 C. A direct comparison is made between the oxide dispersoid strengthened alloy MA 754 (Ni-20Cr containing 0.6Y(2)O(3) and a Ni-20Cr alloy subjected to yttrium ion implantation at a dose of 1 x 1.0E17 ions/cm2. Depth profiling of samples corroded from 1 to 8 min using glancing angle X-ray diffraction was used to identify the initial phases developed as a function of depth. EXAFS (extended X-ray absorption fine structure) studies at the Cr K-edge complemented the diffraction data and also gave an indication of the degree of disorder in the fcc lattice after implantation with yttrium, and its rearrangement on initial heat treatment.

Additional information

Authors: CRABB T A, JRC Ispra (IT);GIBSON P N, University of Strathclyde, Department of Pure & Applied Chemistry, Glasgow (GB);MCALPINE E, University of Strathclyde, Department of Physics & Applied Physics, Glasgow (GB)
Bibliographic Reference: Article: Corrosion Science, Vol. 34 (1993) No. 9, pp. 1541-1550
Record Number: 199311448 / Last updated on: 1994-11-28
Original language: en
Available languages: en