Hi, Paula
Silicon nitride is a much harder and denser material than alumina oxide
or other ceramics, and is thus much harder to sinter any alloy to, as it
requires much higher temperatures to do so.
However, there are methods of doing it, but I do not know who does it. I
have only seen it done on sheets of silicon nitride, not bearings.
I know nickel can be sintered to silicon nitride, and I believe you
could then add some amount of silver using an immersion plating process.
I do know that you cannot sinter silver to nitrides directly, because of
the much higher temperatures needed. Of the three types of silicon
nitride, only one lends itself to any type of bonding, the others are
just too dense. It is like trying to bond to lead.
However, if it is possible to sinter nickel to the surface, I am
thinking it may be possible to perform ultrasonic soldering directly to
the third most porous type.
R. Dean Stadem
Consulting Engineer
Analog Technologies Corp./Lumagine, Inc.
11441 Rupp Drive
Burnsville, MN 55431
(952)894-9228
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Thursday, October 29, 2009 6:03 PM
To: [log in to unmask]
Subject: Re: [TN] silicone nitride ball question
Paula,
Silicon nitride is a ceramic. You can't attach any solder to it by
soldering. You can vapor deposit it on metals and you can probably glue
it
if you have a rough enough surface. There may be other ways to attach
materials to it, but I don't know of them. You need to talk to a
ceramist.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Meyers, Paula
Sent: Thursday, October 29, 2009 10:26 AM
To: [log in to unmask]
Subject: [TN] silicone nitride ball question
Just a quick question. I'm sure all of you gurus can do this in your
sleep.
I have heard that silicone nitride balls cannot be silver soldered. Is
this still true? Are there any other ways to fasten a silicone nitride
ball?
* * * * *What seat materials are used with a silicone nitride ball
Cheers,
Paula
Paula Meyers
EFD
Product Application Specialist
952-847-3332
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