Effect of milling on the carbothermal reduction of oxide mixture for (Ti,W)C-Ni

Hanjung Kwon; Shinhoo Kang

doi:10.2320/matertrans.MRA2007267

Effect of milling on the carbothermal reduction of oxide mixture for (Ti,W)C-Ni

Hanjung Kwon
, Shinhoo Kang^*

^*Corresponding author for this work

Metallurgical System Engineering

Seoul National University

Research output: Contribution to journal › Journal article › peer-review

24 Scopus citations

Abstract

The effect of high-energy milling on the phase transformation and carbothermal reduction was examined using an oxide mixture. TiO ₂-WO₃-NiO-C, with a process to synthesize (Ti,W)C cermets. Due to the high energy involved in the mill raw, anatase TiO₂ transformed first to TiO₂-H and then to rutile, while WO₃ transformed to a high-pressure WO₃-HP and hexagonal WO₃ phase. The co-existence of WO₃ and TiO₂ enhanced the formation of a nano-crystalline or amorphous phase. The (Ti.W)C phase was formed mainly at 1150°C from TiC and WC formed in the early stages. These results were further examined using XRD. the Rietveld method and mass spectroscopy.

Original language	English
Pages (from-to)	1594-1599
Number of pages	6
Journal	Materials Transactions
Volume	49
Issue number	7
DOIs	https://doi.org/10.2320/matertrans.MRA2007267
State	Published - 2008.07

Keywords

Cermets
High-energy milling
Mass spectrometer
Rietveld
Solid-solution

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title = "Effect of milling on the carbothermal reduction of oxide mixture for (Ti,W)C-Ni",

abstract = "The effect of high-energy milling on the phase transformation and carbothermal reduction was examined using an oxide mixture. TiO 2-WO3-NiO-C, with a process to synthesize (Ti,W)C cermets. Due to the high energy involved in the mill raw, anatase TiO2 transformed first to TiO2-H and then to rutile, while WO3 transformed to a high-pressure WO3-HP and hexagonal WO3 phase. The co-existence of WO3 and TiO2 enhanced the formation of a nano-crystalline or amorphous phase. The (Ti.W)C phase was formed mainly at 1150°C from TiC and WC formed in the early stages. These results were further examined using XRD. the Rietveld method and mass spectroscopy.",

keywords = "Cermets, High-energy milling, Mass spectrometer, Rietveld, Solid-solution",

author = "Hanjung Kwon and Shinhoo Kang",

year = "2008",

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language = "English",

volume = "49",

pages = "1594--1599",

journal = "Materials Transactions",

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TY - JOUR

T1 - Effect of milling on the carbothermal reduction of oxide mixture for (Ti,W)C-Ni

AU - Kwon, Hanjung

AU - Kang, Shinhoo

PY - 2008/7

Y1 - 2008/7

N2 - The effect of high-energy milling on the phase transformation and carbothermal reduction was examined using an oxide mixture. TiO 2-WO3-NiO-C, with a process to synthesize (Ti,W)C cermets. Due to the high energy involved in the mill raw, anatase TiO2 transformed first to TiO2-H and then to rutile, while WO3 transformed to a high-pressure WO3-HP and hexagonal WO3 phase. The co-existence of WO3 and TiO2 enhanced the formation of a nano-crystalline or amorphous phase. The (Ti.W)C phase was formed mainly at 1150°C from TiC and WC formed in the early stages. These results were further examined using XRD. the Rietveld method and mass spectroscopy.

AB - The effect of high-energy milling on the phase transformation and carbothermal reduction was examined using an oxide mixture. TiO 2-WO3-NiO-C, with a process to synthesize (Ti,W)C cermets. Due to the high energy involved in the mill raw, anatase TiO2 transformed first to TiO2-H and then to rutile, while WO3 transformed to a high-pressure WO3-HP and hexagonal WO3 phase. The co-existence of WO3 and TiO2 enhanced the formation of a nano-crystalline or amorphous phase. The (Ti.W)C phase was formed mainly at 1150°C from TiC and WC formed in the early stages. These results were further examined using XRD. the Rietveld method and mass spectroscopy.

KW - Cermets

KW - High-energy milling

KW - Mass spectrometer

KW - Rietveld

KW - Solid-solution

UR - https://www.scopus.com/pages/publications/50549087975

U2 - 10.2320/matertrans.MRA2007267

DO - 10.2320/matertrans.MRA2007267

M3 - Journal article

AN - SCOPUS:50549087975

SN - 1345-9678

VL - 49

SP - 1594

EP - 1599

JO - Materials Transactions

JF - Materials Transactions

IS - 7

ER -

Effect of milling on the carbothermal reduction of oxide mixture for (Ti,W)C-Ni

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Keywords

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