Band structure based predictive criteria for selecting densifying additives during sintering of transition metal based hardmetals and iono-covalent ceramics

A. A. Ogwu; T. J. Davies

doi:10.1016/0921-4526(95)00889-6

Band structure based predictive criteria for selecting densifying additives during sintering of transition metal based hardmetals and iono-covalent ceramics

A. A. Ogwu, T. J. Davies

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

It is our observation that the thermo-kinetic factors associated with sintering and densification in transition metal based hardmetal-binder systems and in iono-covalent ceramics with metal oxide additives have a common feature, namely an underpinning electronic driving force. The commonality of the electronic driving force mechanism for sintering and densification is due to the presence of bonding and anti-bonding energy levels in both systems. It is our proposal that the filling of the anti-bonding levels with electrons leads to destabilization, liquid phase formation and rapid diffusion that assists sintering and densification.

Original language	English
Pages (from-to)	131-135
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	222
Issue number	1-3
DOIs	https://doi.org/10.1016/0921-4526(95)00889-6
Publication status	Published - May 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(95)00889-6

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title = "Band structure based predictive criteria for selecting densifying additives during sintering of transition metal based hardmetals and iono-covalent ceramics",

abstract = "It is our observation that the thermo-kinetic factors associated with sintering and densification in transition metal based hardmetal-binder systems and in iono-covalent ceramics with metal oxide additives have a common feature, namely an underpinning electronic driving force. The commonality of the electronic driving force mechanism for sintering and densification is due to the presence of bonding and anti-bonding energy levels in both systems. It is our proposal that the filling of the anti-bonding levels with electrons leads to destabilization, liquid phase formation and rapid diffusion that assists sintering and densification.",

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year = "1996",

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journal = "Physica B: Condensed Matter",

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AU - Ogwu, A. A.

AU - Davies, T. J.

PY - 1996/5

Y1 - 1996/5

N2 - It is our observation that the thermo-kinetic factors associated with sintering and densification in transition metal based hardmetal-binder systems and in iono-covalent ceramics with metal oxide additives have a common feature, namely an underpinning electronic driving force. The commonality of the electronic driving force mechanism for sintering and densification is due to the presence of bonding and anti-bonding energy levels in both systems. It is our proposal that the filling of the anti-bonding levels with electrons leads to destabilization, liquid phase formation and rapid diffusion that assists sintering and densification.

AB - It is our observation that the thermo-kinetic factors associated with sintering and densification in transition metal based hardmetal-binder systems and in iono-covalent ceramics with metal oxide additives have a common feature, namely an underpinning electronic driving force. The commonality of the electronic driving force mechanism for sintering and densification is due to the presence of bonding and anti-bonding energy levels in both systems. It is our proposal that the filling of the anti-bonding levels with electrons leads to destabilization, liquid phase formation and rapid diffusion that assists sintering and densification.

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JO - Physica B: Condensed Matter

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SN - 0921-4526

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ER -

Band structure based predictive criteria for selecting densifying additives during sintering of transition metal based hardmetals and iono-covalent ceramics

Abstract

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