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Nikasil Coating Thickness
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Posted by: Ghostrider
Any sputtering experts out there? I'm curious about how thick Nikasil coatings can be made on a cylinder wall. What is the max thickness before delamination becomes a problem? Could a cylinder be bored and re-coated thick enough so that a stock piston can be fitted? What is the chemical composition of Nickasil anyway (Ni??)? And am I spelling it correctly?
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ghost
Posted by: woody51
Nikasil is nickel silicon-carbide plating. I don't know how thick it can be applied. I would think that if it were too thick the heat transfer could be affected. Just a thought.
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Kevin
97 CR 250, 96 CBR 600
You Bleed Red so you might as well Ride Red
Posted by: Rich Rohrich
I sent the question to Eric Gorr and Scott at US Chrome so we can get some expert feedback.
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Rich Rohrich
==
"Wisdom is not a product of schooling but of the life-long attempt to acquire it."
- Albert Einstein
Posted by: sean
can it be honed or is it completely maintence free? How many hours would the plating last on a 125 race bike? How much does replating cost?thanks
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Posted by: P_Taylor
I think I remember a post saying that the cylinders should be bored .010 over to allow room for the plating. That would put the plating .005 thick.
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Patrick Taylor
Posted by: Eric Gorr
The standard thickness on OEM cylinders is .002 inch whereas aftermarket platers like US Chrome use .006 inch. That way you can hone is several times before it wears though in areas like the top of the ring travel and around the exhaust port.
The typical life of a stock plated cylinder is about 100 hours or 5 piston changes.
Plating can be layered thicker but too much and it can become brittle.
Good luck
Posted by: Ghostrider
Thanks for all the info. Heat transfer may be an issue, but it wouldn't add too much since it would have the same number of boundary layers, one would be a little thicker (depends on hear transfer coefficient of Nikasil). I think I'll try to pick the brains of the US Chrome people a little.
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ghost
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