A COATED CAST IRON CRUCIBLE FOR USE WITH EUTECTIC Al-Si ALLOY IN THE TEMPERATURE RANGE 595-650 C

Technical Report · Fri Nov 01 04:00:00 EST 1957

DOI:https://doi.org/10.2172/4157970· OSTI ID:4157970

Yaggee, F. L.

The feasibility of the coated metal crucible as a container for eutectic Al--Si alloy was proven by test. Small enamel-coated east-iron pets have successfully withstood Al-- Si alloys and an oxidizing atmosphere for a period of 3 months at 725 deg C. A similarly coated east-iron crucible containing 450 pounds of eutectic Al--Si alloy was successfully tested for 144 days in a jacketing operation conducted at 595 deg to 650 deg C. Under the same conditions, the normal service life of clay-bonded graphite and silicon carbide crucibles rarely exceeds 45 days. The coating material for the iron crucible is a commercially available enamel capa ble of withstanding temperatures up to 790 deg C. lt is readily applied to the surface of a variety of ferrous metals and alloys; however, best results are obtained with alloys low in chromium and nickel which also have a low thermal expansion coefficient. (auth)

• Research Organization: Argonne National Lab., Lemont, Ill.
• DOE Contract Number: W-31109-ENG-38
• NSA Number: NSA-14-018132
• OSTI ID: 4157970
• Report Number(s): ANL-5673
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM ALLOYS
ATMOSPHERE
BONDING
CAST IRON
CERAMICS
CHROMIUM ALLOYS
CLAYS
COATING
CRUCIBLES
EFFICIENCY
EUTECTICS
EXPANSION
GRAPHITE
HIGH TEMPERATURE
IRON ALLOYS
MATERIALS TESTING
METALS, CERAMICS, AND OTHER MATERIALS
NICKEL ALLOYS
OXIDATION
SILICIDES
SILICON CARBIDES
SURFACES
THERMAL DIFFUSION
USES
VESSELS