NSUF 13-413: Advanced Microstructural Characterization of Spark Plasma Sintered Lanthanum-Bearing Nanostructured Ferritic Steels
Nanostructured ferritic steels (NSF) have attracted much attention as fuel cladding applications in advanced fast reactors. These steels are traditionally processed using high energy ball milling of constituent powders and subsequently consolidated using hot isostatic pressing or hot extrusion. Traditionally, these steels contained yttrium oxide in a ferritic or ferritic-martensitic matrix. These steels develop a high number density of a complex Y-Ti-O based nanofeatures that result in superior elevated temperature strength and irradiation resistance. The current proposal aims to study a lanthanum oxide containing NFS (14LMT) processed via high energy ball milling and spark plasma sintering. The alloys have already showed some promising results. However, the development of La-Ti-O type nanofeatures need to be investigated further using high resolution transmission electron microscopy and atom probe tomography. Thus, five specimens will be examined to assess the effects of alloying element and high temperature heat treatment. If successful, this will lead to the understanding of the compositional/structural evolution and thermal stability of the La-containing nanofeatures paving way to further improve the alloy properties for nuclear applications. The proposed work will be completed within a span of two months.
Additional Info
| Field | Value |
|---|---|
| Abstract | Nanostructured ferritic steels (NSF) have attracted much attention as fuel cladding applications in advanced fast reactors. These steels are traditionally processed using high energy ball milling of constituent powders and subsequently consolidated using hot isostatic pressing or hot extrusion. Traditionally, these steels contained yttrium oxide in a ferritic or ferritic-martensitic matrix. These steels develop a high number density of a complex Y-Ti-O based nanofeatures that result in superior elevated temperature strength and irradiation resistance. The current proposal aims to study a lanthanum oxide containing NFS (14LMT) processed via high energy ball milling and spark plasma sintering. The alloys have already showed some promising results. However, the development of La-Ti-O type nanofeatures need to be investigated further using high resolution transmission electron microscopy and atom probe tomography. Thus, five specimens will be examined to assess the effects of alloying element and high temperature heat treatment. If successful, this will lead to the understanding of the compositional/structural evolution and thermal stability of the La-containing nanofeatures paving way to further improve the alloy properties for nuclear applications. The proposed work will be completed within a span of two months. |
| Award Announced Date | 2013-04-22T00:00:00 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Yaqiao Wu |
| Irradiation Facility | None |
| PI | Indrajit Charit |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 413 |