Effect of Fabrication Method of Fe-TiB2 Nanocomposite Powders on Spark-Plasma Sintering Behavior

• Autorzy: Bae Sun-Woo , Huynh Xuan-Khoa , Kim Ji-Soon

Identyfikatory

DOI

10.24425/amm.2020.133211

• Języki publikacji: EN

Abstrakty

EN

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).

Słowa kluczowe

EN

Fe-TiB2 composite; ex-situ; in-situ; iron boride; titanium hydride; high-energy ball-milling; spark plasma sintering; densification behavior

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 3
• Strony: 1023--1028
• Opis fizyczny: Bibliogr. 16 poz., fot., rys.

Twórcy

autor

Bae Sun-Woo

• University of Ulsan, School of Materials Science and Engineering, 55 Bon-gil 12, Technosaneop-ro, Nam-gu, Ulsan 44776, Korea

autor

Huynh Xuan-Khoa

• Industrial University of Ho Chi Minh City, Faculty of Mechanical Technology, Ho Chi Minh City, Vietnam

autor

Kim Ji-Soon

• University of Ulsan, School of Materials Science and Engineering, 55 Bon-gil 12, Technosaneop-ro, Nam-gu, Ulsan 44776, Korea

Bibliografia

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Uwagi

EN

1. This work was supported by the 2018 Research Fund of University of Ulsan.

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).