(Ti,W)C-Ni cermet prepared by high-energy ball milling and subsequent carbothermal reduction of TiO2-Ti-WO3-C mixture

Hanjung Kwon; Jiwoong Kim; Sun A. Jung; Chang Yul Suh; Dae Sup Kil; Ki Min Roh; Wonbaek Kim

doi:10.1016/j.ceramint.2013.11.141

(Ti,W)C-Ni cermet prepared by high-energy ball milling and subsequent carbothermal reduction of TiO₂-Ti-WO₃-C mixture

Hanjung Kwon
, Jiwoong Kim
, Sun A. Jung
, Chang Yul Suh
, Dae Sup Kil
, Ki Min Roh
, Wonbaek Kim^*

^*Corresponding author for this work

Metallurgical System Engineering

Korea Institute of Geoscience and Mineral Resources

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

18 Scopus citations

Abstract

A single-phase (Ti,W)C solid solution was prepared by high-energy ball milling of TiO₂-Ti-WO₃-C powder mixtures with various TiO₂/Ti ratios and subsequent carbothermal reduction. Thermodynamic calculations suggest that the reaction pathways would follow the sequences WO₃→WC, TiO₂→Ti₂O₃, Ti(CO)→TiC, Ti₂O₃→TiC, and TiC+WC→(Ti,W)C. The reaction pathways were substantiated by measuring CO gas evolution and heat flow using QMS and DSC, respectively. The 80(Ti,W)C-20Ni powders were sintered in vacuum at 1510 C and their mechanical properties were evaluated. The toughness values of (Ti,W)C-Ni cermet were significantly higher than those of TiC-Ni cermet owing to the alloying effect of W in TiC. The composition of raw powder mixture also affected the mechanical properties of (Ti,W)C-Ni after sintering. The toughness was improved when TiO₂/Ti ratio was 2 in the raw powder mixture than when pure Ti or TiO₂ was used. The enhanced toughness is attributed to larger (Ti,W)C grain size.

Original language	English
Pages (from-to)	7607-7611
Number of pages	5
Journal	Ceramics International
Volume	40
Issue number	5
DOIs	https://doi.org/10.1016/j.ceramint.2013.11.141
State	Published - 2014.06

Keywords

Cermet
Fracture toughness
Mechanical alloying
Solid solution

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10.1016/j.ceramint.2013.11.141

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@article{0e14724c57854efc8f9f552417d5e56c,

title = "(Ti,W)C-Ni cermet prepared by high-energy ball milling and subsequent carbothermal reduction of TiO2-Ti-WO3-C mixture",

abstract = "A single-phase (Ti,W)C solid solution was prepared by high-energy ball milling of TiO2-Ti-WO3-C powder mixtures with various TiO2/Ti ratios and subsequent carbothermal reduction. Thermodynamic calculations suggest that the reaction pathways would follow the sequences WO3→WC, TiO2→Ti2O3, Ti(CO)→TiC, Ti2O3→TiC, and TiC+WC→(Ti,W)C. The reaction pathways were substantiated by measuring CO gas evolution and heat flow using QMS and DSC, respectively. The 80(Ti,W)C-20Ni powders were sintered in vacuum at 1510 C and their mechanical properties were evaluated. The toughness values of (Ti,W)C-Ni cermet were significantly higher than those of TiC-Ni cermet owing to the alloying effect of W in TiC. The composition of raw powder mixture also affected the mechanical properties of (Ti,W)C-Ni after sintering. The toughness was improved when TiO2/Ti ratio was 2 in the raw powder mixture than when pure Ti or TiO2 was used. The enhanced toughness is attributed to larger (Ti,W)C grain size.",

keywords = "Cermet, Fracture toughness, Mechanical alloying, Solid solution",

author = "Hanjung Kwon and Jiwoong Kim and Jung, \{Sun A.\} and Suh, \{Chang Yul\} and Kil, \{Dae Sup\} and Roh, \{Ki Min\} and Wonbaek Kim",

year = "2014",

month = jun,

doi = "10.1016/j.ceramint.2013.11.141",

language = "English",

volume = "40",

pages = "7607--7611",

journal = "Ceramics International",

issn = "0272-8842",

number = "5",

}

TY - JOUR

T1 - (Ti,W)C-Ni cermet prepared by high-energy ball milling and subsequent carbothermal reduction of TiO2-Ti-WO3-C mixture

AU - Kwon, Hanjung

AU - Kim, Jiwoong

AU - Jung, Sun A.

AU - Suh, Chang Yul

AU - Kil, Dae Sup

AU - Roh, Ki Min

AU - Kim, Wonbaek

PY - 2014/6

Y1 - 2014/6

N2 - A single-phase (Ti,W)C solid solution was prepared by high-energy ball milling of TiO2-Ti-WO3-C powder mixtures with various TiO2/Ti ratios and subsequent carbothermal reduction. Thermodynamic calculations suggest that the reaction pathways would follow the sequences WO3→WC, TiO2→Ti2O3, Ti(CO)→TiC, Ti2O3→TiC, and TiC+WC→(Ti,W)C. The reaction pathways were substantiated by measuring CO gas evolution and heat flow using QMS and DSC, respectively. The 80(Ti,W)C-20Ni powders were sintered in vacuum at 1510 C and their mechanical properties were evaluated. The toughness values of (Ti,W)C-Ni cermet were significantly higher than those of TiC-Ni cermet owing to the alloying effect of W in TiC. The composition of raw powder mixture also affected the mechanical properties of (Ti,W)C-Ni after sintering. The toughness was improved when TiO2/Ti ratio was 2 in the raw powder mixture than when pure Ti or TiO2 was used. The enhanced toughness is attributed to larger (Ti,W)C grain size.

AB - A single-phase (Ti,W)C solid solution was prepared by high-energy ball milling of TiO2-Ti-WO3-C powder mixtures with various TiO2/Ti ratios and subsequent carbothermal reduction. Thermodynamic calculations suggest that the reaction pathways would follow the sequences WO3→WC, TiO2→Ti2O3, Ti(CO)→TiC, Ti2O3→TiC, and TiC+WC→(Ti,W)C. The reaction pathways were substantiated by measuring CO gas evolution and heat flow using QMS and DSC, respectively. The 80(Ti,W)C-20Ni powders were sintered in vacuum at 1510 C and their mechanical properties were evaluated. The toughness values of (Ti,W)C-Ni cermet were significantly higher than those of TiC-Ni cermet owing to the alloying effect of W in TiC. The composition of raw powder mixture also affected the mechanical properties of (Ti,W)C-Ni after sintering. The toughness was improved when TiO2/Ti ratio was 2 in the raw powder mixture than when pure Ti or TiO2 was used. The enhanced toughness is attributed to larger (Ti,W)C grain size.

KW - Cermet

KW - Fracture toughness

KW - Mechanical alloying

KW - Solid solution

UR - https://www.scopus.com/pages/publications/84894596034

U2 - 10.1016/j.ceramint.2013.11.141

DO - 10.1016/j.ceramint.2013.11.141

M3 - Journal article

AN - SCOPUS:84894596034

SN - 0272-8842

VL - 40

SP - 7607

EP - 7611

JO - Ceramics International

JF - Ceramics International

IS - 5

ER -

(Ti,W)C-Ni cermet prepared by high-energy ball milling and subsequent carbothermal reduction of TiO₂-Ti-WO₃-C mixture

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Keywords

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