Publication detail

Intensive particle rearrangement in the early stage of spark plasmasintering process

WANG, L. POUCHLÝ, V. MACA, K. SHEN, Z. XIONG, Y.

Original Title

Intensive particle rearrangement in the early stage of spark plasmasintering process

English Title

Intensive particle rearrangement in the early stage of spark plasmasintering process

Type

journal article in Web of Science

Language

en

Original Abstract

The densification behaviors of 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) ceramicsduring spark plasma sintering (SPS) were analyzed both using the master sintering curve (MSC) approachand by evaluating the temperature dependent evolution of density and densification rate. It was foundthat densification curves could hardly be fitted using one apparent activation energy value by MSCconception, by which it indicated that more than one densification mechanisms were involved in SPS.Moreover, dependent neither on applied pressure (20–100 MPa) nor heating rates higher than 50◦C/min,the maximum densification rate had always been observed at rather similar ∼78% of theoretical density(TD) accompanied with negligible grain growth. An intensive particle rearrangement mechanism wasproposed to dominate the rapid densification to 78% TD in early stage of SPS process, by which it yieldedthe considerable faster densification rate than those achievable by diffusion-related processes.

English abstract

The densification behaviors of 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) ceramicsduring spark plasma sintering (SPS) were analyzed both using the master sintering curve (MSC) approachand by evaluating the temperature dependent evolution of density and densification rate. It was foundthat densification curves could hardly be fitted using one apparent activation energy value by MSCconception, by which it indicated that more than one densification mechanisms were involved in SPS.Moreover, dependent neither on applied pressure (20–100 MPa) nor heating rates higher than 50◦C/min,the maximum densification rate had always been observed at rather similar ∼78% of theoretical density(TD) accompanied with negligible grain growth. An intensive particle rearrangement mechanism wasproposed to dominate the rapid densification to 78% TD in early stage of SPS process, by which it yieldedthe considerable faster densification rate than those achievable by diffusion-related processes.

Keywords

Spark plasma sintering (SPS), Densification, Particle rearrangementa

RIV year

2015

Released

01.06.2015

ISBN

2187-0764

Periodical

Journal of Asian Ceramic Societies

Year of study

3

Number

2

State

JP

Pages from

183

Pages to

187

Pages count

5

Documents

BibTex


@article{BUT124193,
  author="Ling {Wang} and Václav {Pouchlý} and Karel {Maca} and Zhijian {Shen} and Yan {Xiong}",
  title="Intensive particle rearrangement in the early stage of spark plasmasintering process",
  annote="The densification behaviors of 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) ceramicsduring spark plasma sintering (SPS) were analyzed both using the master sintering curve (MSC) approachand by evaluating the temperature dependent evolution of density and densification rate. It was foundthat densification curves could hardly be fitted using one apparent activation energy value by MSCconception, by which it indicated that more than one densification mechanisms were involved in SPS.Moreover, dependent neither on applied pressure (20–100 MPa) nor heating rates higher than 50◦C/min,the maximum densification rate had always been observed at rather similar ∼78% of theoretical density(TD) accompanied with negligible grain growth. An intensive particle rearrangement mechanism wasproposed to dominate the rapid densification to 78% TD in early stage of SPS process, by which it yieldedthe considerable faster densification rate than those achievable by diffusion-related processes.",
  chapter="124193",
  doi="10.1016/j.jascer.2015.02.004",
  howpublished="online",
  number="2",
  volume="3",
  year="2015",
  month="june",
  pages="183--187",
  type="journal article in Web of Science"
}