Enhanced radiation tolerance in nanocrystalline MgGa{sub 2}O{sub 4}
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The authors demonstrate a substantial enhancement in radiation-induced amorphization resistance for single-phased nanocrystalline (NC) versus large-grained polycrystalline MgGa{sub 2}O{sub 4}. NC and large-grained MgGa{sub 2}O{sub 4} were irradiated at {approx}100 K with 300 keV Kr{sup ++} ions to fluences ranging between 5x10{sup 19} and 4x10{sup 20} Kr/m{sup 2}. Large-grained MgGa{sub 2}O{sub 4} samples began to amorphize by a fluence of 5x10{sup 19} Kr/m{sup 2}, while NC MgGa{sub 2}O{sub 4} remained crystalline with no evidence for structural changes (other than moderate grain growth in the lowermost implanted region), to a fluence of 4x10{sup 20} Kr/m{sup 2}. To our knowledge, this is the first experimental study to reveal enhanced amorphization resistance in an irradiated, single-phase, NC material.
- OSTI ID:
- 20971990
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 90; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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