- Tytuł:
- Effect of Fabrication Method of Fe-TiB2 Nanocomposite Powders on Spark-Plasma Sintering Behavior
- Autorzy:
-
Bae, Sun-Woo
Huynh, Xuan-Khoa
Kim, Ji-Soon - Powiązania:
- https://bibliotekanauki.pl/articles/351535.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
Fe-TiB2 composite
ex-situ
in-situ
iron boride
titanium hydride
high-energy ball-milling
spark plasma sintering
densification behavior - Opis:
- In this study, Fe-40wt% TiB2 nanocomposite powders were fabricated by two different methods: (1) conventional powder metallurgical process by simple high-energy ball-milling of Fe and TiB2 elemental powders (ex-situ method) and (2) high-energy ball-milling of the powder mixture of (FeB+TiH2 ) followed by reaction synthesis at high temperature (in-situ method). The ex-situ powder was prepared by planetary ball-milling at 700 rpm for 2 h under an Ar-gas atmosphere. The in-situ powder was prepared under the same milling condition and heat-treated at 900°C for 2 h under flowing argon gas in a tube furnace to form TiB2 particulates through a reaction between FeB and Ti. Both Fe-TiB2 composite powder compacts were sintered by a spark-plasma sintering (SPS) process. Sintering was performed at 1150°C for the ex-situ powder compact and at 1080°C for the in-situ powder for 10 minutes under 50 MPa of sintering pressure and 0.1 Pa vacuum for both processes. The heating rate was 50°/min to reach the sintering temperature. Results from analysis of shrinkage and microstructural observation showed that the in-situ composite powder compacts had a homogeneous and fine microstructure compared to the ex-situ preparation, even though the sintered densities were almost the same (99.6 and 99.8% relative density, respectively).
- Źródło:
-
Archives of Metallurgy and Materials; 2020, 65, 3; 1023-1028
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł