binding Au to stainless steel
binding Au to stainless steel
(OP)
I am looking for a method to bind high purity (99.999) Au foil to a stainless steel substrate. We have tried the brute force method of scoring the stainless steel surface and pressing the Au, but this leaves the Au surface very rough (due to the roughened stainless steel surface). I am wondering whether it is possible for Au to form an alloy with stainless steel directly or by using an intermediate soldier. Ideally this would be done with relatively low T (< 260 C). Any advice is appreciated.





RE: binding Au to stainless steel
RE: binding Au to stainless steel
You can solder. I would start by plating the stainless with Cu or Ni and then looking for a solder to use.
What shape are you working with? If you are working with strips of metal you could roughen the stainless (blast and piclkle) and the roll bond them. If the finish roll is polished you will get a good finish on the gold.
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Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: binding Au to stainless steel
Another requirement is that the binding agent is conductive, so glue is not acceptable.
The stainless steel substrates are 1 cm disks that are a few mm thick. The gold is 0.003"-thick foil cut into 0.1" wide squares. We us a sapphire plate to press the Au into the substrate.
RE: binding Au to stainless steel
RE: binding Au to stainless steel
it might take a long time to build up .003" but it would be clean.
Nick
I love materials science!
RE: binding Au to stainless steel
RE: binding Au to stainless steel
You could gold plate and then mechanically bond. Work with 1/2" wide strips a foot long or so. Find a small rolling mill in a lab to use for the bonding.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: binding Au to stainless steel
I suggest polishing the SS strip, electroplating with nickel (no copper, just a Wood's nickel strike), then roll bonding followed by baking to improve adhesion.
Does the Au foil really need to be 0.003" thick?
If not, just gold coat the Ni-plated SS by evaporation.
RE: binding Au to stainless steel
I ran across this while investigating Nickel Aluminide as possible solution to your problem.
http://www.rntfoil.com/
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RE: binding Au to stainless steel
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RE: binding Au to stainless steel