kpmi
Search
- Page Path
- HOME > Search
- [English]
- Effect of SiC and WC additon on Oxidation Behavior of Spark-Plasma-Sintered ZrB2
- Chang-Yeoul Kim, Jae-Seok Choi, Sung-Churl Choi
- J Korean Powder Metall Inst. 2019;26(6):455-462. Published online December 1, 2019
- DOI: https://doi.org/10.4150/KPMI.2019.26.6.455
- 262 View
- 1 Download
- 1 Citations
-
Abstract
PDF ZrB2 ceramic and ZrB2 ceramic composites with the addition of SiC, WC, and SiC/WC are successfully synthesized by a spark plasma sintering method. During high-temperature oxidation, SiC additive form a SiO2 amorphous outer scale layer and SiC-deplete ZrO2 scale layer, which decrease the oxidation rate. WC addition forms WO3 during the oxidation process to result in a ZrO2/WO3 liquid sintering layer, which is known to improve the antioxidation effect. The addition of SiC and WC to ZrB2 reduces the oxygen effective diffusivity by one-fifth of that of ZrB2. The addition of both SiC and WC shows the formation of a SiO2 outer dense glass layer and ZrO2/WO3 layer so that the anti-oxidation effect is improved three times as much as that of ZrB2. Therefore, SiC- and WC-added ZrB2 has a lower two-order oxygen effective diffusivity than ZrB2; it improves the anti-oxidation performance 3 times as much as that of ZrB2.
-
Citations
Citations to this article as recorded by
- Role of TiC and WC Addition on the Mechanism and Kinetics of Isothermal Oxidation and High-Temperature Stability of ZrB2–SiC Composites
Pradyut Sengupta, Indranil Manna
High Temperature Corrosion of Materials.2024; 101(S1): 57. CrossRef
- Role of TiC and WC Addition on the Mechanism and Kinetics of Isothermal Oxidation and High-Temperature Stability of ZrB2–SiC Composites
- [Korean]
- Fabrication and Characterization of Porous Nickel Membrane for High Precision Gas Filter by In-situ Reduction/Sintering Process
- Nam-Hoon Kim, Han-Bok Song, Sung-Churl Choi, Yong-Ho Choa
- J Korean Powder Metall Inst. 2009;16(4):262-267.
- DOI: https://doi.org/10.4150/KPMI.2009.16.4.262
- 343 View
- 3 Download
- 5 Citations
-
Abstract
PDF
- Disk type porous nickel membrane was fabricated by in-situ reduction/sintering process using compacted NiO/PMMA (PMMA; Polymethyl methacrylate) mixture at 800°C in hydrogen atmosphere. The porosity (49sim58%) of these membrane was investigated as an amount of PMMA additive. The thermal decomposition and reduction behavior of NiO/PMMA were analyzed by TG/DTA in hydrogen atmosphere and the activation energy for the hydrogen reduction of NiO and thermal degradation of PMMA was calculated as 61.1 kJ/mol, evaluated by Kissinger method. Finally, the filtering performance and pressure drop were measured by particle counting system.
-
Citations
Citations to this article as recorded by- Fabrication of Porous Ni by Freeze Drying and Hydrogen Reduction of NiO/Camphene Slurry
Jae-Hun Jeong, Sung-Tag Oh, Chang-Yong Hyun
Journal of Korean Powder Metallurgy Institute.2019; 26(1): 6. CrossRef - Fabrication of Porous W by Heat Treatment of Pore Forming Agent of PMMA and WO3 Powder Compacts
Ki Cheol Jeon, Young Do Kim, Myung-Jin Suk, Sung-Tag Oh
Journal of Korean Powder Metallurgy Institute.2015; 22(2): 129. CrossRef - Fabrication of Porous Cu by Freeze-drying Process of Camphene Slurry with CuO-coated Cu Powders
Su-Ryong Bang, Sung-Tag Oh
Journal of Korean Powder Metallurgy Institute.2014; 21(3): 191. CrossRef - Fabrication of Porous Ti by Freeze-Drying and Heat Treatment of TiH2/Camphene Slurries
한길 서, 명진 석, 영도 김, 승탁 오
Korean Journal of Materials Research.2013; 23(6): 339~343. CrossRef - Freeze Drying for Porous Mo with Sublimable Vehicles of Eutectic System
Gyu-Tae Lee, Han Gil Seo, Myung-Jin Suk, Sung-Tag Oh
Journal of Korean Powder Metallurgy Institute.2013; 20(4): 253. CrossRef
- Fabrication of Porous Ni by Freeze Drying and Hydrogen Reduction of NiO/Camphene Slurry
First
Prev
TOP
