What question did this study set out to answer?

To elucidate the mechanisms controlling neck formation and neck growth in conducting spherical copper powders under pulsed direct current during spark plasma sintering.

December 14, 2005Journal of the American Ceramic Society

Neck Formation and Self‐Adjusting Mechanism of Neck Growth of Conducting Powders in Spark Plasma Sintering

View Full Paper

Ask AI

Bookmark

Authors

XSXiaoyan SongQingdao University XLXuemei LiuTongji University JZJiuxing ZhangHefei University of Technology

Discussion

Member takes

Implication

Experimental study reveals a self-adjusting neck growth mechanism during spark plasma sintering of copper powders, indicating how pulsed current drives uniform microstructure formation.

Key Points

To elucidate the mechanisms controlling neck formation and neck growth in conducting spherical copper powders under pulsed direct current during spark plasma sintering.
Examined the microstructures of spherical copper powder particles across distinct stages of the spark plasma sintering process.
Developed theoretical models to quantify the local temperature distributions and electrical current intensity effects across particle-contact interfaces.
Pulsed direct current created severe temperature gradients between particle surfaces and centers, reaching the material's boiling point at contact surfaces to initiate neck formation through local melting and rapid solidification.
Neck growth was governed by a dynamic competition between widening neck cross-sectional area and rising temperature-dependent electrical resistivity.
Identified a self-adjusting coarsening mechanism that naturally homogenizes neck dimensions and fine-grain sizes throughout the neck zones.

Cite This Study

Song et al. (2005) studied this question.

synapsesocial.com/papers/6aae36fac763f45372cc6645 https://doi.org/10.1111/j.1551-2916.2005.00777.x

View Full Paper

Ask AI

Bookmark

December 14, 2005Journal of the American Ceramic Society

Neck Formation and Self‐Adjusting Mechanism of Neck Growth of Conducting Powders in Spark Plasma Sintering

View Full Paper

Ask AI

Bookmark

Authors

XSXiaoyan SongQingdao University XLXuemei LiuTongji University JZJiuxing ZhangHefei University of Technology

Discussion

Member takes

Implication

Experimental study reveals a self-adjusting neck growth mechanism during spark plasma sintering of copper powders, indicating how pulsed current drives uniform microstructure formation.

Key Points

To elucidate the mechanisms controlling neck formation and neck growth in conducting spherical copper powders under pulsed direct current during spark plasma sintering.
Examined the microstructures of spherical copper powder particles across distinct stages of the spark plasma sintering process.
Developed theoretical models to quantify the local temperature distributions and electrical current intensity effects across particle-contact interfaces.
Pulsed direct current created severe temperature gradients between particle surfaces and centers, reaching the material's boiling point at contact surfaces to initiate neck formation through local melting and rapid solidification.
Neck growth was governed by a dynamic competition between widening neck cross-sectional area and rising temperature-dependent electrical resistivity.
Identified a self-adjusting coarsening mechanism that naturally homogenizes neck dimensions and fine-grain sizes throughout the neck zones.

Cite This Study

Song et al. (2005) studied this question.

synapsesocial.com/papers/6aae36fac763f45372cc6645 https://doi.org/10.1111/j.1551-2916.2005.00777.x

Also Consider

Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context:

View Full Paper

Ask AI

Bookmark