Fine-grained W-Cu-Co alloys via liquid phase sintering

Jerry Wittenauer; T. G. Nieh

Fine-grained W-Cu-Co alloys via liquid phase sintering

Jerry Wittenauer
, T. G. Nieh

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

4 Citations (Scopus)

Abstract

The liquid phase sintering behavior of the W-Cu and W-Cu-Co systems is described. It is shown that the density of the sintered products can be greatly improved by both the addition of Co to W-Cu and by mechanical alloying of the elemental powders prior to sintering. The addition of Co allows for greater densification during the rearrangement stage of liquid phase sintering because of improved wetting of the liquid phase. Mechanical alloying allows for greater densification during the rearrangement stage for two reasons. Firstly, the process leads to improved mixing allowing for a more homogeneous distribution of the liquid-forming phase. Secondly, mechanical alloying yields an irregular powder morphology which experiences a greater driving force for rearrangement than quasi-spherical particles. The grain size in the sintered W-Cu-Co materials is in the range of 5-10 μm. The fine grain size is a result of the fact that the primary mechanism for grain growth in liquid phase sintering - solution-reprecipitation - is greatly suppressed in the W-Cu-Co system.

Original language	English
Title of host publication	Tungsten and Tungsten Alloys
Publisher	Publ by Minerals, Metals & Materials Soc (TMS)
Pages	21-26
ISBN (Print)	0873391330
Publication status	Published - 1991
Externally published	Yes
Event	120th TMS Annual Meeting on Recent Advances in Tungsten and Tungsten Alloys - New Orleans, LA, USA Duration: 17 Feb 1991 → 21 Feb 1991

Conference

Conference	120th TMS Annual Meeting on Recent Advances in Tungsten and Tungsten Alloys
City	New Orleans, LA, USA
Period	17/02/91 → 21/02/91

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Fine-grained W-Cu-Co alloys via liquid phase sintering",

abstract = "The liquid phase sintering behavior of the W-Cu and W-Cu-Co systems is described. It is shown that the density of the sintered products can be greatly improved by both the addition of Co to W-Cu and by mechanical alloying of the elemental powders prior to sintering. The addition of Co allows for greater densification during the rearrangement stage of liquid phase sintering because of improved wetting of the liquid phase. Mechanical alloying allows for greater densification during the rearrangement stage for two reasons. Firstly, the process leads to improved mixing allowing for a more homogeneous distribution of the liquid-forming phase. Secondly, mechanical alloying yields an irregular powder morphology which experiences a greater driving force for rearrangement than quasi-spherical particles. The grain size in the sintered W-Cu-Co materials is in the range of 5-10 μm. The fine grain size is a result of the fact that the primary mechanism for grain growth in liquid phase sintering - solution-reprecipitation - is greatly suppressed in the W-Cu-Co system.",

author = "Jerry Wittenauer and Nieh, \{T. G.\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].; 120th TMS Annual Meeting on Recent Advances in Tungsten and Tungsten Alloys ; Conference date: 17-02-1991 Through 21-02-1991",

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pages = "21--26",

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T1 - Fine-grained W-Cu-Co alloys via liquid phase sintering

AU - Wittenauer, Jerry

AU - Nieh, T. G.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 1991

Y1 - 1991

N2 - The liquid phase sintering behavior of the W-Cu and W-Cu-Co systems is described. It is shown that the density of the sintered products can be greatly improved by both the addition of Co to W-Cu and by mechanical alloying of the elemental powders prior to sintering. The addition of Co allows for greater densification during the rearrangement stage of liquid phase sintering because of improved wetting of the liquid phase. Mechanical alloying allows for greater densification during the rearrangement stage for two reasons. Firstly, the process leads to improved mixing allowing for a more homogeneous distribution of the liquid-forming phase. Secondly, mechanical alloying yields an irregular powder morphology which experiences a greater driving force for rearrangement than quasi-spherical particles. The grain size in the sintered W-Cu-Co materials is in the range of 5-10 μm. The fine grain size is a result of the fact that the primary mechanism for grain growth in liquid phase sintering - solution-reprecipitation - is greatly suppressed in the W-Cu-Co system.

AB - The liquid phase sintering behavior of the W-Cu and W-Cu-Co systems is described. It is shown that the density of the sintered products can be greatly improved by both the addition of Co to W-Cu and by mechanical alloying of the elemental powders prior to sintering. The addition of Co allows for greater densification during the rearrangement stage of liquid phase sintering because of improved wetting of the liquid phase. Mechanical alloying allows for greater densification during the rearrangement stage for two reasons. Firstly, the process leads to improved mixing allowing for a more homogeneous distribution of the liquid-forming phase. Secondly, mechanical alloying yields an irregular powder morphology which experiences a greater driving force for rearrangement than quasi-spherical particles. The grain size in the sintered W-Cu-Co materials is in the range of 5-10 μm. The fine grain size is a result of the fact that the primary mechanism for grain growth in liquid phase sintering - solution-reprecipitation - is greatly suppressed in the W-Cu-Co system.

UR - https://www.scopus.com/pages/publications/0026399340

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0026399340&origin=recordpage

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 0873391330

SP - 21

EP - 26

BT - Tungsten and Tungsten Alloys

PB - Publ by Minerals, Metals & Materials Soc (TMS)

T2 - 120th TMS Annual Meeting on Recent Advances in Tungsten and Tungsten Alloys

Y2 - 17 February 1991 through 21 February 1991

ER -

Fine-grained W-Cu-Co alloys via liquid phase sintering

Abstract

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