silicon - but silica , an oxide of silicon usually in the

SiO2 family.

Vance

Vance, I agree with you that the castings are
infused with silica. The element used for IC
wafers is, however, indeed silicon. Great care
is used to prevent oxides when making
semiconductors until making insulating layers.
Ok off topic, sorry Paul! Bill Jepson

I wonder how far they are infused. I think you can grind off the
surface layer and castings will weld fine.

Paul Lamar

If you are talking about welding cast iron. It is a dicey process requiring
special nickel rods, pre-heating, and good knowledge of the metalurgy of
both the parts to be welded. Not something your typical welder can do and
get a quality result.

I don't think that aluminum is quite as bad, but don't have any first hand
experience with it.

Monty

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.