Evolution of microstructure,mechanical, and optical properties of Y2O3-MgO nanocomposites fabricated by high pressure spark plasma sintering |
| |
| Affiliation: | 1. Field-Assisted Sintering Group, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan;2. Ceramics Processing Group, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan;1. The Unit of Energy Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel;2. Israel Atomic Energy Commission (IAEC), P.O. Box 7061, Tel Aviv, 61070, Israel;3. Institute for Applied Research, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel;4. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel;5. NRCN, P.O. Box 9001, Beer-Sheva, 84190, Israel;1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang, Liaoning 110819, China;2. Research Center for Advanced Ceramic Materials, School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China;3. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;1. Young Researchers and Elite Club,Najafabad Branch, Islamic Azad University, Najafabad, Iran;2. Department of Materials Engineering, Malek Ashtar University of Technology, P.O. Box 83145/115, Shahin Shahr, Isfahan, Iran;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China;2. School of Metallurgy and Materials, University of Birmingham, Birmingham, UK;3. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, China |
| |
| Abstract: | A high-pressure spark plasma sintering (SPS) process was applied for consolidating Y2O3–MgO nanocomposites. This approach enabled to fabricate a fully dense infrared (IR) transparent nanocomposites, which possess an average grain size of ∼70 nm and high hardness, at a relatively low sintering temperature of 1130 °C under a high pressure of 300 MPa. The light transmittance was improved with increasing pressure and reached to the maximum transmittance of 64.5% at a wavelength of 0.2–1.6 μm owing to the fine-grained microstructure. The Vickers hardness exhibited 16.6 ± 0.7 GPa for the grain size of 74 nm, which is significantly higher than that of the sub-micro grains obtained at a conventional sintering pressure of 70 MPa (11.9 ± 0.8 GPa). The hardness rigorously followed the Hall–Petch relationship, that is, it is enhanced with a reduction of the grain size. Successful fabrication of the high-performance Y2O3–MgO nanocomposites indicates that the nanopowder processing followed by the high-pressure sintering process can be applied for fabricating fully dense fine-grained nanocomposites with excellent optical and mechanical properties. |
| |
| Keywords: | High pressure SPS sintering IR-transmittance Mechanical properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
