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Sintered, as a process Posted by CrNiFe [Email] ![]() ![]() ![]() In Reply to: Sintered brake pads, awg, Wed, 8 Jun 2005 23:30:54 Members do not see ads below this line. - Help Keep This Site Online - Signup |
In sintering, you take a powder (metal or ceramic), and compact it using pressure in a form, called a green shape. Binders help keep it stuck together.
Then you take the green shape and bring it up to a temperature high enough to burn off the binder compounds but not enough to melt the powder completely, and hold it there for a long time. Powder particle that are adjacent then merge together (diffusion).
Sometimes further pressure is applied, as in Hot Isostatic Pressure (HIP) processing, to increase the density to near theoretical. Then the part is cooled, and voila, a metal or ceramic part, with the right shape, tight dimensions and good mechanical properties, without requiring lots of detailed machining.
You can add other things, like carbon fibres, to the metal mix, and they will end up in the matrix. I imagine the "sintered" brake pades are a proprietary mix of metal, fibres and binders.
So it is a process, like casting or forging, rather than a characteristic property like toughness or strength.
I don't know how they sell the sintered pads, but I imagine they work okay.
CrNiFe
99MY 9-5SW, 2.3lpt 95000km
posted by 65.92.76...
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