Microstructure and mechanical properties of hot pressed ZrB2-SiCp-ZrO2 composites

Xinghong Zhang; Weijie Li; Changqing Hong; Wenbo Han; Jiecai Han

doi:10.1016/j.matlet.2007.12.006

Microstructure and mechanical properties of hot pressed ZrB₂-SiC_p-ZrO₂ composites

Xinghong Zhang
, Weijie Li^*
, Changqing Hong
, Wenbo Han
, Jiecai Han

^*Corresponding author for this work

School of Astronautics

Harbin Institute of Technology

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

19 Scopus citations

Abstract

The present paper investigated the microstructure and mechanical properties of ZrB₂-10 vol.%SiC_p-10 vol.%ZrO₂ composites hot pressed at three temperatures. Phase transformability from t-ZrO₂ to m-ZrO₂ during fracture was analyzed through calculating the volume fractions of m-ZrO₂ and t-ZrO₂ on polished and fracture surfaces. The densification temperature was found to have a significant effect on the microstructure, phase transformation and the properties of the composites. When the composite was hot pressed at 1950 °C, the average grain size was 9.5 μm, and the fracture toughness was 4.5 MPa·m^1/2. Comparatively, when the composite was hot pressed at 1750 °C, the average grain size was 3.4 μm, and the fracture toughness increased by ~ 50% to 6.8 MPa·m^1/2.

Original language	English
Pages (from-to)	2404-2406
Number of pages	3
Journal	Materials Letters
Volume	62
Issue number	16
DOIs	https://doi.org/10.1016/j.matlet.2007.12.006
State	Published - 15 Jun 2008

Keywords

Densification temperature
Mechanical properties
Microstructure
Phase transformation

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10.1016/j.matlet.2007.12.006

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title = "Microstructure and mechanical properties of hot pressed ZrB2-SiCp-ZrO2 composites",

abstract = "The present paper investigated the microstructure and mechanical properties of ZrB2-10 vol.\%SiCp-10 vol.\%ZrO2 composites hot pressed at three temperatures. Phase transformability from t-ZrO2 to m-ZrO2 during fracture was analyzed through calculating the volume fractions of m-ZrO2 and t-ZrO2 on polished and fracture surfaces. The densification temperature was found to have a significant effect on the microstructure, phase transformation and the properties of the composites. When the composite was hot pressed at 1950 °C, the average grain size was 9.5 μm, and the fracture toughness was 4.5 MPa·m1/2. Comparatively, when the composite was hot pressed at 1750 °C, the average grain size was 3.4 μm, and the fracture toughness increased by \textasciitilde{} 50\% to 6.8 MPa·m1/2.",

keywords = "Densification temperature, Mechanical properties, Microstructure, Phase transformation",

author = "Xinghong Zhang and Weijie Li and Changqing Hong and Wenbo Han and Jiecai Han",

year = "2008",

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doi = "10.1016/j.matlet.2007.12.006",

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TY - JOUR

T1 - Microstructure and mechanical properties of hot pressed ZrB2-SiCp-ZrO2 composites

AU - Zhang, Xinghong

AU - Li, Weijie

AU - Hong, Changqing

AU - Han, Wenbo

AU - Han, Jiecai

PY - 2008/6/15

Y1 - 2008/6/15

N2 - The present paper investigated the microstructure and mechanical properties of ZrB2-10 vol.%SiCp-10 vol.%ZrO2 composites hot pressed at three temperatures. Phase transformability from t-ZrO2 to m-ZrO2 during fracture was analyzed through calculating the volume fractions of m-ZrO2 and t-ZrO2 on polished and fracture surfaces. The densification temperature was found to have a significant effect on the microstructure, phase transformation and the properties of the composites. When the composite was hot pressed at 1950 °C, the average grain size was 9.5 μm, and the fracture toughness was 4.5 MPa·m1/2. Comparatively, when the composite was hot pressed at 1750 °C, the average grain size was 3.4 μm, and the fracture toughness increased by ~ 50% to 6.8 MPa·m1/2.

AB - The present paper investigated the microstructure and mechanical properties of ZrB2-10 vol.%SiCp-10 vol.%ZrO2 composites hot pressed at three temperatures. Phase transformability from t-ZrO2 to m-ZrO2 during fracture was analyzed through calculating the volume fractions of m-ZrO2 and t-ZrO2 on polished and fracture surfaces. The densification temperature was found to have a significant effect on the microstructure, phase transformation and the properties of the composites. When the composite was hot pressed at 1950 °C, the average grain size was 9.5 μm, and the fracture toughness was 4.5 MPa·m1/2. Comparatively, when the composite was hot pressed at 1750 °C, the average grain size was 3.4 μm, and the fracture toughness increased by ~ 50% to 6.8 MPa·m1/2.

KW - Densification temperature

KW - Mechanical properties

KW - Microstructure

KW - Phase transformation

UR - https://www.scopus.com/pages/publications/41949111631

U2 - 10.1016/j.matlet.2007.12.006

DO - 10.1016/j.matlet.2007.12.006

M3 - 文章

AN - SCOPUS:41949111631

SN - 0167-577X

VL - 62

SP - 2404

EP - 2406

JO - Materials Letters

JF - Materials Letters

IS - 16

ER -

Microstructure and mechanical properties of hot pressed ZrB₂-SiC_p-ZrO₂ composites

Abstract

Keywords

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