#
# top.uni.aps.anl.gov:/home/www/beamtime-requests/req00220.txt
# UNICAT Member Beam Time Request  #220

# created Fri Nov 30 16:25:08 CST 2001
#
beamline:
	33ID

collaboration:
	No

collaborator+Pete:
	on

contact:
	andrew.allen@nist.gov

days:
	7

description:
	This is a continuation of our SBUSAXS investigation of different kinds of thermal barrier coating (TBC) microstructures and their response to thermal cycling that mimics service life. Previous experiments suggest that electron-beam physical-vapor deposited (EB-PVD) coatings must be studied in 2 or 3 orthogonal sample orientations since they do not possess the axial symmetry of thermal-spray (TS) deposits. Apart from obtaining a more complete characterization of as-deposited and thermally-cycled EB-PVD coatings along these lines, we wish to investigate high-velocity oxy-fuel (HVOF) deposits for the first time. This would allow a quantitative microstructure comparison of 3 very different generic TBC microstructures: TS, EB-PVD and HVOF.

equipment+required:
	USAXS with side-reflection stages (i.e., SBUSAXS) and x-ray energy of 17 keV for penetration of YSZ deposits.
	NOTE: Experiment needs continuous fill, i.e,  constant beam current conditions.

experiment:
	SBUSAXS of Advanced HVOF, Thermal-Spray and EB-PVD Coatings on Substrates

foreign+nationals:
	Andrew Allen (UK), Jan Ilavsky (Czech Rep.), Anand Kulkarni (India)
	
	All previous users.

hazards:
	NONE

minimumdays:
	6

name:
	Andrew Allen

nonmembers:
	Andrew Allen (NIST), Jan Ilavsky (NIST), Anand Kulkarni (SUNY), Tabbetha Dobbins (NIST)
	
	All previous users at time of experiment.

unacceptable+dates:
	February 17 - March 13 (Jan unavailable).
	April 12 -16.


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