Activated liquid phase sintering of W–Cu and Mo–Cu

Johnson, John L.

doi:10.1016/j.ijrmhm.2015.04.030

Cited by 72 publications

(12 citation statements)

References 23 publications

(34 reference statements)

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“…The eutectic liquid made very little contribution to the densification. 17,18) In our systems, similar densification behaviors are shown in Figs. 3 and 4 as well.…”

Section: Densificationsupporting

confidence: 79%

Low-temperature Sintering Behavior of TiO2 Activated with CuO

Paek

Shin²,

et al. 2016

J. Korean Ceram. Soc

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In TiO 2-CuO systems, low-temperature sinterability was investigated by a conventional sintering method. Sintering temperatures were set at under 950 o C, at which the volume diffusion is inactive. The temperatures are less than the melting point of Ag (961 o C), which is often used as an internal conductor in low-temperature co-fired ceramic technology. To optimize the amount of CuO dopant, various dopant contents were added. The optimum level for enhanced densification was 2 wt% CuO. Excess dopants were segregated to the grain boundaries. The segregated dopants supplied a high diffusion path, by which grain boundary diffusion improved. At lower temperatures in the solid state region, grain boundary diffusion was the principal mass transport mechanism for densification. The enhanced grain boundary diffusion, therefore, improved densification. In this regard, the results of this study prove that the sintering mechanism was the same as that of activated sintering.

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“…The eutectic liquid made very little contribution to the densification. 17,18) In our systems, similar densification behaviors are shown in Figs. 3 and 4 as well.…”

Section: Densificationsupporting

confidence: 79%

Low-temperature Sintering Behavior of TiO2 Activated with CuO

Paek

Shin²,

et al. 2016

J. Korean Ceram. Soc

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“…For temperatures in the range of 1100°C to 1500°C, there are reports indicating that molybdenum is fully soluble in copper in amounts of 0.5 to 1.3 wt pct Mo. [50][51][52] The existence of Mo solubility in Cu supports the densification process during sintering for this type of material. This is particularly observed when Mo particles not exceeding 2 lm are used.…”

Section: E Serological Analysismentioning

confidence: 99%

Novel Functionally Gradient Composites Al2O3-Cu-Mo Obtained via Centrifugal Slip Casting

Zygmuntowicz

Winkler

Wachowski

et al. 2021

Metall Mater Trans A

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The investigations applied the original concept of the formation of materials as hybrid gradient composites. Two innovative technologies were used: formation by centrifugal slip casting and sintering with varying proportions of the liquid phase. This allowed us to create a gradient microstructure. This article presents the study of Al2O3-Cu-Mo gradient composites. This work aimed to determine the effect of the metallic phase content on the composite’s microstructure and basic properties. The most critical element of the study will be determining the ability to control the location and flow of the liquid phase during the sintering process. The research demonstrated that adding a third component in the form of Mo reduces the liquid Cu flow onto the surface of the composites during the sintering process. In this research, we achieve results with high cognitive value. Graphic Abstract

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“…In particular, Co and Fe can form intermetallic compounds with W, which may act as an atomic diffusion channel that significantly enhances the diffusion of W. As a result, the sintering density, hardness, and strength of the composite bulk will be increased. However, elements such as Ni and Pd, which are more readily dissolved in Cu, decrease the solubility of W in Cu during the sintering process and thus cannot effectively increase the sintering densification and properties of the bulk material at some concentrations 52,53 .…”

Section: Interaction With W/cu Interfacementioning

confidence: 99%

W–Cu composites with submicron- and nanostructures: progress and challenges

et al. 2019

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W-Cu composite materials are widely used in civilian industries and aerospace fields owing to their integrated properties of high hardness, wear and arc resistance, electrical and thermal conductivities, and low coefficient of thermal expansion. The recently developed submicron-and nanostructured W-Cu composites exhibit superior performance compared to their conventional coarse-grained counterparts and are expected to further expand applications of this group of materials. This review is focused on recent important progress in the preparation, characterization, and mechanical and physical properties of W-Cu composites with refined structures. We summarize the technologies that are capable of refining component structures and evaluate their advantages and limitations. Furthermore, the effects of component refinement and additives such as alloying elements and dispersed particles on the comprehensive performance of W-Cu composites are demonstrated. At the end of the review, we propose potential research issues and directions worthy of attention for the future development of W-Cu composites.

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Activated liquid phase sintering of W–Cu and Mo–Cu

Cited by 72 publications

References 23 publications

Low-temperature Sintering Behavior of TiO2 Activated with CuO

Low-temperature Sintering Behavior of TiO2 Activated with CuO

Novel Functionally Gradient Composites Al2O3-Cu-Mo Obtained via Centrifugal Slip Casting

W–Cu composites with submicron- and nanostructures: progress and challenges

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