Development of a versatile, high-temperature, high-throughput ion irradiation system

2021 ◽  
pp. 165892
Author(s):  
Michael Moorehead ◽  
Benoit Queylat ◽  
Hongliang Zhang ◽  
Kim Kriewaldt ◽  
Adrien Couet
Keyword(s):  
High Temperature ◽  
High Throughput ◽  
Ion Irradiation ◽  
Irradiation System

Design of a molybdenum high throughput microreactor for high temperature screening of catalytic coatings

2004 ◽  
Vol 101 (1-3) ◽  
pp. 225-235 ◽  
Author(s):  
M.J.M. Mies ◽  
E.V. Rebrov ◽  
M.H.J.M. de Croon ◽  
J.C. Schouten
Keyword(s):  
High Temperature ◽  
High Throughput

Microstructural Instability in Mosi2/Sic Nanolayers

1997 ◽  
Vol 3 (S2) ◽  
pp. 399-400
Author(s):  
Y.C. Lu ◽  
H. Kung ◽  
J-P Hirvonen ◽  
T.R. Jervis ◽  
M. Nastasi ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Irradiation ◽  
High Temperature Strength ◽  
Second Phase ◽  
Microstructural Stability ◽  
Factors Affecting ◽  
Structural Applications ◽  
Thermal Compatibility ◽  
Two Phases ◽  
The Stability

Thin film multilayers have been the focus of extensive studies recently due to the interesting properties they exhibit. Since the improvement in properties can be attributed directly to the unique nanoscale microstructures, it is essential to understand the factors affecting the microstructural stability in these nanolayer structures. The intermetallic compound, MoSi2, despite its superior oxidation resistance and high melting point, suffers from inadequate high temperature strength and low temperature ductility, properties which hinder its high temperature structural applications [1]. SiC is a potential second phase reinforcement due to its high temperature strength and thermal compatibility with MoSi2. The addition of SiC in a nanolayered configuration has been shown to exhibit significant increase in hardness after annealing [2]. It has also been shown that when annealed above 900°C, the layers break down and grain growth sets in, with a significant decrease in hardness and. Due to the lack of a thermochemical driving force, the two phases remain separate at all temperatures investigated. In this study, the stability of the MoSi2/SiC nanolayers structure under ion irradiation has been investigated.

scholarly journals Effect of Helium on Dispersoid Evolution under Self-Ion Irradiation in A Dual-Phase 12Cr Oxide-Dispersion-Strengthened Alloy

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3343 ◽  
Author(s):  
Hyosim Kim ◽  
Tianyao Wang ◽  
Jonathan G. Gigax ◽  
Shigeharu Ukai ◽  
Frank A. Garner ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Irradiation ◽  
Critical Mass ◽  
Control Sample ◽  
Oxide Dispersion Strengthened ◽  
Future Generation ◽  
High Temperature Strength ◽  
Oxide Dispersion ◽  
Dual Phase ◽  
Peak Displacement

As one candidate alloy for future Generation IV and fusion reactors, a dual-phase 12Cr oxide-dispersion-strengthened (ODS) alloy was developed for high temperature strength and creep resistance and has shown good void swelling resistance under high damage self-ion irradiation at high temperature. However, the effect of helium and its combination with radiation damage on oxide dispersoid stability needs to be investigated. In this study, 120 keV energy helium was preloaded into specimens at doses of 1 × 1015 and 1 × 1016 ions/cm2 at room temperature, and 3.5 MeV Fe self-ions were sequentially implanted to reach 100 peak displacement-per-atom at 475 °C. He implantation alone in the control sample did not affect the dispersoid morphology. After Fe ion irradiation, a dramatic increase in density of coherent oxide dispersoids was observed at low He dose, but no such increase was observed at high He dose. The study suggests that helium bubbles act as sinks for nucleation of coherent oxide dispersoids, but dispersoid growth may become difficult if too many sinks are introduced, suggesting that a critical mass of trapping is required for stable dispersoid growth.

Sign in / Sign up

Export Citation Format

Share Document