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SiC Coating on Steel




I want to cast Aluminum in laboratory scale. I'm going to use a steel crucible and stirrer. I want to coat steel with Silicon Carbide as I'm worried about contamination of Iron with melt Aluminum. So please let me know of a way which I could apply a Silico Carbide coating on steel. Silico Carbide crucibles or other ceramic crucibles are not practicable in my situation. Or is there any economical metal which I could use instead of steel which will not give any contamination problem?

Thushanthi D.A.A.S.
- Calgary, Alberta, Canada
2003


I'm not an expert on aluminum melting and I don't know how much contamination can your experiment tolerate. What I know is that millions of aluminum parts are injected everyday in bare H-13 steel molds. To avoid the need of a release agent you can nickel and chrome plate the crucible and stirrer. This combination has a good chemical resistance and a melting point far above the aluminum.

Guillermo Marrufo
Monterrey, NL, Mexico
2003




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