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# Takeshi Egami <egami@utk.edu>
# requesting 6 days, at minimum=5 days
# beamline 33BM, Resonant X-ray Scattering Study of the Atomic Structure of Bulk Metallic Glasses
# instrument 33BM-C fourc
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# top:/home/www/beamtime-requests/req00822.txt
# UNICAT Member Beam Time Request  #822
# created Thu Aug 18 10:37:48 CDT 2005
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apsrun:
	2005-03

beamline:
	33BM

collaboration:
	Yes

collaborator_Paul:
	ON

collaborator_Pete:
	ON

contact:
	egami@utk.edu

days:
	6

description:
	Metallic glasses are usually obtained by quenching liquid with sufficiently high cooling rate that formation of crystalline phase is inhibited. Due to high specific strength and hardness bulk metallic glasses are well suited for many applications, however lack of ductility has been limiting factor in use as a structural material. It has been found that small addition of Pd to ZrCuAl BMG system has pronounced effect on mechanical prop-erties. Only 3 atomic percent improves ductility significantly, however it was found that more than  9 at%  of Pd induces brittleness again. The purpose of these studies is to ob-serve change in the atomic structures of the ternary ZrCuAl BMG due to partial substitu-tion by Pd atoms and correlate it with the mechanical properties.   
 	The atomic structure of metallic glass can be studied with x-ray scattering to ob-tain the total or compositionally resolved atomic pair-density functions (PDF). We will use resonant scattering at the Pd and Zr absorption edges to obtain differential pair correlation function. This type of experiment allows resolving compositional coordi-nation and changes in the Zr and Pd atomic environment. The research on the mechanical properties of BMG is sponsored through DOE and NSF grants.

equipment_required:
	vortex detector

experiment:
	Resonant X-ray Scattering Study of the Atomic Structure of Bulk Metallic Glasses

foreign_nationals:
	Konstantin Lockshin

hazards:
	No hazard is expected.

instrument:
	33BM-C fourc

instrument_other:
	

minimumdays:
	5

name:
	Takeshi Egami

nonmembers:
	Wojtek Dmowski

submit:
	Submit

unacceptable_dates:
	

z34ID_details:
	


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