ON OXIDE FILMS AND SCALES OF Fe-Si-Cr SYSTEM ALLOYS AT HIGH TEMPERATURES (in Japanese)
Oxide films and scales produced on the surface layers of iron-silicon-- chromium system alloys (ca. 1 to 7% silicon, 5 to 19% chromium) were observed when they came into contact with air at high temperatures (700 to 1200 deg C) using transmission electron diffraction, x-ray diffraction, and a metallurgical microscope. It was verified that ca. 3 to 7% silicon- chromium-- iron system alloys are covered mainly with Cr/sub 2/O/sub 3/ or alpha -- (Cr,Fe)/sub 2/O/sub 3/ crystal films in the earliest stage of oxidation at 700 and 1000 deg C. Amorphous SiO/sub 2/ films were previously detected on the surfaces of ca. 1 to 6% silicon-- iron system alloys at 700 to lOOO deg C oxidation, but this kind of oxide films was not observed on the surfaces of ca. 1 to 4% silicon-- chromium-- iron system alloys heated in air under the same conditions. The present studies also clarified experimentally that the heat-resisting films of iron-- silicon-- chromium system alloys oxidized in air at l100 and l200 deg C for 7 hr are composed of fine Cr/sub 2/O/sub 3/ crystals. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-006419
- OSTI ID:
- 4128706
- Journal Information:
- Nippon Kinzoku Gakkaishi (Japan), Journal Name: Nippon Kinzoku Gakkaishi (Japan) Vol. Vol: 24, No. 6; ISSN NIKGA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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