I am looking for 2-compound (maximum 3-compound) amorphous alloy for diffusion experiments
Hello Miroslav,
Obtaining metallic glasses often require 4 or more elements (see Inoue rules). Moreover, one of the criterion for a stable metallic glass is to obtain a Tg over Tm ration about 0.6. Empirically, alloys with this ratio have been proved better glass formers.
However, you should look the ZrCu (binary) or ZrCuAl (ternary) system. The binary alloy is not very stable in time, but addition of aluminium increases the stability.
I also know compositions with three elements are possible in the MgCuY system, but these alloys melt at low temperature.
One last solution could be gold-silicon alloys, but these are pretty expensive!
Would you be interested by data on ZrCu and ZrCuAl alloys? I studied some of those a few years ago, and I could send you Tg and Tm values...
Hello,
Thank you for your reply, it proved to be very helpful.The main problem with our experiment is to find an alloy, which won't crystallize below Tamman's temperature, which is required to activate diffusion process,(that's the reason why we want the Tg to be above 2/3 of melting temperature). I would be grateful for any information about melting temperature and glass-forming temperature of ZrCu and ZrCuAl alloys. Also an information about potential composition of such alloys would be very useful. I am looking forward to hearing from you.
Hello (again),
I've sorted you a .doc file with thermal data for 3 ZrCu alloys that my colleagues and I have been studying a few years ago. Tg stands for the onset of the glass transition, obviously, Tx for the onset of 1st crystallization, and Tm for the offset of melting temperature (last particule of solid become liquid).All the temperatures have been measured through DSC
I hope this data will help you, even if the alloys don't fit your requirement of Tg/Tm>0.66.
Don't hesitate to contact me if you need any help with it.
You're welcome!
Don't hesitate to contact me for further assistance, I'll be happy to help.
If you need samples, I can help you as well. I'm fully equipped to prepared such glasses by various methods.
Hi Miroslaw, I fully agree with Loic. Alternatively you may consider amorphous alloys in the Pd-Si system with a Tg/Tm ~ 0.6. Unlike usual binary system that are rather marginal glass formers Pd-Si alloys can be prepared in bulk with low cooling rates.
If you are interested in amorphous alloys, I'm open.They carry them 5 methods. The above alloys are expensive but easy to make.
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