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- Title
FABRICATION OF Fe-TiB<sub>2</sub> NANOCOMPOSITES BY SPARK-PLASMA SINTERING OF A (FeB, TiH<sub>2</sub>) POWDER MIXTURE.
- Authors
HUYNH, X. -K.; KIM, B. -W.; KIM, J. -S.
- Abstract
Fe-40wt% TiB2 nanocomposites were fabricated by mechanical activation and spark-plasma sintering of a powder mixture of iron boride (FeB) and titanium hydride (TiH2). The powder mixture of (FeB, TiH2) was prepared by high-energy ball milling in a planetary ball mill at 700 rpm for 3 h followed by spark-plasma sintering (SPS) at various conditions. Analysis of the change in relative sintered density and densification rate during sintering showed that a self-propagating high-temperature synthesis reaction occurs to form TiB2 from FeB and Ti. A sintered body with relative density higher than 98% was obtained after sintering at 1150°C for 5 and 15 min. The microstructural observation of sintered compacts with the use of FE-SEM and TEM revealed that ultrafine particulates with approximately 5 nm were evenly distributed in an Fe-matrix. A hardness value of 83 HRC was obtained, which is equivalent to that of conventional WC-20 Co systems.
- Subjects
NANOCOMPOSITE materials; IRON analysis; TEMPERATURE measurements; TITANIUM hydride; SINTERING
- Publication
Archives of Metallurgy & Materials, 2018, Vol 63, Issue 2, p1043
- ISSN
1733-3490
- Publication type
Article
- DOI
10.24425/122440