Enhanced oxide whisker growth on cold-rolled aluminum-containing

Details Enhanced oxide whisker growth on cold-rolled aluminum-containing Enhanced oxide whisker growth on cold-rolled aluminum-containing

1980-08-15

1982-03-09

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252477R, 148 635, 428629, B01J 2104, B01J 2326, B01J 3502, C23C 1112

Patent

active

043188281

ABSTRACT:
Alumina whiskers are grown on cold-rolled Fe-Cr-Al alloy foil by a two-step oxidation treatment. A bare metal surface is initially oxidized by heating while exposing to a predominantly inert atmosphere containing 0.1 volume percent oxygen or less. Thereafter, the surface is further oxidized by heating while exposing to air to grow the whiskers. In a preferred embodiment, whisker-covered foil is coated with a catalyst-bearing alumina layer and suitably wound into a structure for use in an automotive catalytic converter.

REFERENCES:
patent: 3920583 (1975-11-01), Pugh
patent: 3957692 (1976-05-01), Cairns et al.
patent: 4096095 (1978-06-01), Cairns
Tien et al., "Mechanism of Oxide Adherence on Fe-25Cr-Al(Y or Sc) Alloys", Metallurgical Transactions, vol. 3, Jun. 1972, pp. 1587-1599.

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