The influence of yttrium addition on the cyclic oxidation resistance of PM chromium
The beneficial effect of yttrium added by ion implantation and as an oxide dispersion on the cyclic oxidation behaviour of powder metallurgical (PM) produced chromium was studied. The material loss was evaluated both by measuring the specific mass change as a function of the number of cycles and using the thin layer activation (TLA) method. Using the TLA method it is possible to measure directly the metal consumption as a function of cycles and temperature. The increase in cyclic oxidation resistance at 900 and 1000 C when adding yttrium to the base metal is shown. The differences between the conventional specific mass change measurements and those obtained by the TLA technique show that new insights can be gained by the direct measurement of material loss, by excluding the added variable of metal oxide growth.
Bibliographic Reference: Paper presented: EURO MAT 95, Venice (IT), September 25-28, 1995
Availability: Available from (1) as Paper EN 39290 ORA
Record Number: 199511458 / Last updated on: 1995-11-03
Original language: en
Available languages: en