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Mr DOHC
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Brisbane
Registered:
October 2002

Re: arrgh!!! i broke my superalloy :(

Sat, 27 August 2005 08:25

oldcorollas wrote on Sat, 27 August 2005 16:04

hmmm.. well i can't tell you what alloy it is, except it's a new generation (5th??) nickel based gamma/gamma prime directionally grown single crystal superalloy.

and then i electroplate platinum on top and heat treat to diffusion bond the platinum to the substrate..

i thought i'd killed the superalloy structure, but the temp should have been too low for that.. turns out there was more inter-diffusion than we thought and the original structure is found much deeper in the alloy...

the platinum is relatively immobile, so it's probably just nickle and tantalum shifting the gamma/gamma prime loop and de-stabilising the two phase cube structure.....

or something like that Razz

i reckon

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