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# Jan Ilavsky <ilavsky@aps.anl.gov>
# requesting 7 days, at minimum=6 days
# beamline 33ID, "Anisotropic USAXS studies on new Thermal Barrier Coating Chemistries and Solid Oxide Fuel Cell Layers"
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# top:/home/www/beamtime-requests/req00384.txt
# UNICAT Member Beam Time Request  #384
# created Sun Mar 16 09:44:30 CST 2003
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beamline:
	33ID

collaboration:
	No

collaborator+Pete:
	on

contact:
	ilavsky@aps.anl.gov

days:
	7

description:
	A new class of sinter resistant coating chemistries, based upon the pyrochlore (A2B2O7) system, show promise for ultimately replacing yttria-stabilized zirconia (YSZ) at the highest operating temperatures.  YSZ thermal barrier coatings, presently used in prime reliant applications, suffer phase de-stabilization and sintering temperatures above 1400 C.  As turbine engines are operated at higher temperatures in order to improve engine efficiency, new coating materials will become increasingly important.
	
	The proposed experiments will study La2Zr2O7 and other rare earth zirconates deposited by EB-PVD, EB-DVD and plasma spray both before and after heat treatment in order to examine the sintering resistance of those coatings.  Additionally, studies of the latest YSZ microstructures, such as heat-treated dense vertically cracked coatings, will be performed in continuation of work begun on YSZ in a previous cycle.  Solid oxide fuel cell materials, comprised of an 80 um La0.8Sr0.2MnO3 cathode, 5-10 um YSZ electrolyte, and 3um Ni(YSZ) Cermet anode layers will also be examined.  Interestingly, the SOFC materials incorporate both YSZ and some of the rare-earth elements and many similar issues apply.

equipment+required:
	SBUSAXS, requires top-up mode, start after studies period

experiment:
	Anisotropic USAXS studies on new Thermal Barrier Coating Chemistries and Solid Oxide Fuel Cell Layers

foreign+nationals:
	Anand Kulkarni

hazards:
	no hazards

minimumdays:
	6

name:
	Jan Ilavsky

new+request:
	on

nonmembers:
	Anand Kulkarni

unacceptable+dates:
	July 4th, Jan will supply dates later
	
	Preferred schedule in June


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