Thermal-fatigue testing of coatings for fusion-reactor applications

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6537465

Mullendore, A W; Whitley, J B; Mattox, D M

Thermal fatigue testing has been performed on eight coated or clad materials which have potential application as limiters in pulsed tokamak fusion devices. They are chemical vapor deposited (CVD) coatings of TiC, TiB/sub 2/ and B on graphite, plasma sprayed TiB/sub 2/ on Cu, a chemical conversion coating of VB/sub 2/ on V clad Cu, Ti clad Cu and V clad Cu. Testing consisted of up to 1000 cycles of electron beam heating for 1.5 sec. at beam power densities of 1 and 2 kW/cm/sup 2/. Three materials, CVD TiC and TiB/sub 2/ on graphite and plasma sprayed TiB/sub 2/ on Cu survived the 1000 cycle, 2 kW/cm/sup 2/ test with slight but acceptable damage. The most notable test failure was VB/sub 2/ on V clad Cu which deformed severely by a thermal ratcheting mechanism and displayed subsurface melting.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6537465
• Report Number(s): SAND-80-2431C; CONF-810425-5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON
CARBON COMPOUNDS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CLOSED PLASMA DEVICES
COATINGS
COPPER
DEPOSITION
DESIGN
ELEMENTS
FATIGUE
GRAPHITE
LIMITERS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS
NONMETALS
SURFACE COATING
TESTING
THERMAL CYCLING
THERMONUCLEAR DEVICES
TITANIUM BORIDES
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TOKAMAK DEVICES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM