NSUF 17-1104: Radiation tolerance of Mn+1AXn phase nuclear fuel cladding materials
In this project, 1 MeV Kr ions will be used to irradiate Ti2AlC, Cr2AlC, Ti2AlN and Ti4AlN3 compounds (up to 30 dpa) at RT and 300 ?C to study the defect formation mechanism and structural evolution in these fuel cladding materials. DF/BF images and SAED patterns will be collected to observe the structural modifications induced, as well as the specific temperatures and ion fluences at which these modifications occur. In addition, ion irradiation-induced microstructural evolution, including defect evolution and phase transformation, will be compared among these MAX phase compounds. This project will last for 1 month. Initial preparation of all TEM samples will take 3 weeks, followed by one-week observation times on the IVEM facility. We anticipate observing the formation and evolution process of defects, including dislocations and stacking faults, as well as phase transformation processes as a function of fluence and temperature. By comparing the radiation responses of these compounds, we expect to get a conclusion on how temperature, as well as the M, X, and n factors, affect the radiation tolerance of Mn+1AXn phases, thus help assess the radiation tolerance other Mn+1AXn phases and select appropriate compounds for the nuclear fuel cladding materials.
Additional Info
| Field | Value |
|---|---|
| Abstract | In this project, 1 MeV Kr ions will be used to irradiate Ti2AlC, Cr2AlC, Ti2AlN and Ti4AlN3 compounds (up to 30 dpa) at RT and 300 ?C to study the defect formation mechanism and structural evolution in these fuel cladding materials. DF/BF images and SAED patterns will be collected to observe the structural modifications induced, as well as the specific temperatures and ion fluences at which these modifications occur. In addition, ion irradiation-induced microstructural evolution, including defect evolution and phase transformation, will be compared among these MAX phase compounds. This project will last for 1 month. Initial preparation of all TEM samples will take 3 weeks, followed by one-week observation times on the IVEM facility. We anticipate observing the formation and evolution process of defects, including dislocations and stacking faults, as well as phase transformation processes as a function of fluence and temperature. By comparing the radiation responses of these compounds, we expect to get a conclusion on how temperature, as well as the M, X, and n factors, affect the radiation tolerance of Mn+1AXn phases, thus help assess the radiation tolerance other Mn+1AXn phases and select appropriate compounds for the nuclear fuel cladding materials. |
| Award Announced Date | 2017-09-20T12:35:55.007 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Wei-Ying Chen |
| Irradiation Facility | None |
| PI | Rodney Ewing |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1104 |