Fusion neutron irradiation of NiSi alloys at 4. 2K

Conference · Tue Mar 18 04:00:00 EST 1986

OSTI ID:5901003

Guinan, M W; Huang, J S; Hahn, P A

Two Ni alloys with 4 at.% Si and 12.7 at.% Si in solution have been irradiated at 4.2K with 14 MeV fusion neutrons. The resistivity damage rate of well annealed Ni-4%Si alloy showed an initial transient in the plot of d..delta..rho/d..delta..phit versus ..delta..rho. A high dislocation density appeared to reduce this transient. The resistivity damage rate of Ni-12.7%Si alloy showed an unusual behavior; d..delta..rho/d..delta..phit increases with ..delta..rho after the initial transient period. This behavior is attributed to precipitation and growth of Ni/sub 3/Si during irradiation. Post-irradiation isochronal annealing results showed significant effects of cold work and composition on recovery. Ni-4%Si recovered slower than pure nickel and a high dislocation density enhanced its recovery. For the Ni-12.7% Si alloy, recovery ended after being annealed to 38K, after which the resistivity increased with annealing temperature. This is attributed to further precipitation and growth of Ni/sub 3/Si.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5901003
• Report Number(s): UCRL-93493; CONF-860421-11; ON: DE86008769
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
ANNEALING
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DEFECTS
HADRON REACTIONS
HEAT TREATMENTS
IRRADIATION
NEUTRON REACTIONS
NICKEL ALLOYS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PHYSICAL RADIATION EFFECTS
PROTON REACTIONS
RADIATION EFFECTS
SILICON COMPOUNDS
ULTRALOW TEMPERATURE