Preparation of YAG gel coated ZrB2-SiC composite prepared by gelcasting and pressureless sintering

Rujie He; Xinghong Zhang; Ping Hu; Wenbo Han; Changqing Hong

doi:10.1016/j.compositesb.2013.05.039

Preparation of YAG gel coated ZrB₂-SiC composite prepared by gelcasting and pressureless sintering

Rujie He^*, Xinghong Zhang, Ping Hu, Wenbo Han, Changqing Hong

^*Corresponding author for this work

Harbin Institute of Technology

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

24 Citations (Scopus)

Abstract

In this paper, gelcasting and pressureless sintering of YAG gel coated ZrB₂-SiC (YZS) composite were conducted. YAG gel coated ZrB ₂-SiC (YZS) suspension was firstly prepared through sol-gel route. Poly (acrylic acid) was used as dispersant. YZS suspension had the lowest viscosity when using 0.6 wt.% PAA as dispersant. Gelcasting was conducted based on AM-MBAM system. The gelcast YZS sample was then pressureless sintered to about 97% density. During sintering, YAG promoted the densification process from solid state sintering to liquid phase sintering. The average grain sizes of ZrB₂ and SiC in the YZS composite were 3.8 and 1.3 μm, respectively. The flexural strength, fracture toughness and microhardness were 375 ± 37 MPa, 4.13 ± 0.45 MPa m^1/2 and 14.1 ± 0.5 GPa, respectively.

Original language	English
Pages (from-to)	307-312
Number of pages	6
Journal	Composites Part B: Engineering
Volume	54
Issue number	1
DOIs	https://doi.org/10.1016/j.compositesb.2013.05.039
Publication status	Published - 2013
Externally published	Yes

Keywords

A. Ceramic-matrix composites (CMCs)
B. Mechanical properties
B. Microstructure
E. Sintering

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10.1016/j.compositesb.2013.05.039

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title = "Preparation of YAG gel coated ZrB2-SiC composite prepared by gelcasting and pressureless sintering",

abstract = "In this paper, gelcasting and pressureless sintering of YAG gel coated ZrB2-SiC (YZS) composite were conducted. YAG gel coated ZrB 2-SiC (YZS) suspension was firstly prepared through sol-gel route. Poly (acrylic acid) was used as dispersant. YZS suspension had the lowest viscosity when using 0.6 wt.% PAA as dispersant. Gelcasting was conducted based on AM-MBAM system. The gelcast YZS sample was then pressureless sintered to about 97% density. During sintering, YAG promoted the densification process from solid state sintering to liquid phase sintering. The average grain sizes of ZrB2 and SiC in the YZS composite were 3.8 and 1.3 μm, respectively. The flexural strength, fracture toughness and microhardness were 375 ± 37 MPa, 4.13 ± 0.45 MPa m1/2 and 14.1 ± 0.5 GPa, respectively.",

keywords = "A. Ceramic-matrix composites (CMCs), B. Mechanical properties, B. Microstructure, E. Sintering",

author = "Rujie He and Xinghong Zhang and Ping Hu and Wenbo Han and Changqing Hong",

year = "2013",

doi = "10.1016/j.compositesb.2013.05.039",

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volume = "54",

pages = "307--312",

journal = "Composites Part B: Engineering",

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T1 - Preparation of YAG gel coated ZrB2-SiC composite prepared by gelcasting and pressureless sintering

AU - He, Rujie

AU - Zhang, Xinghong

AU - Hu, Ping

AU - Han, Wenbo

AU - Hong, Changqing

PY - 2013

Y1 - 2013

N2 - In this paper, gelcasting and pressureless sintering of YAG gel coated ZrB2-SiC (YZS) composite were conducted. YAG gel coated ZrB 2-SiC (YZS) suspension was firstly prepared through sol-gel route. Poly (acrylic acid) was used as dispersant. YZS suspension had the lowest viscosity when using 0.6 wt.% PAA as dispersant. Gelcasting was conducted based on AM-MBAM system. The gelcast YZS sample was then pressureless sintered to about 97% density. During sintering, YAG promoted the densification process from solid state sintering to liquid phase sintering. The average grain sizes of ZrB2 and SiC in the YZS composite were 3.8 and 1.3 μm, respectively. The flexural strength, fracture toughness and microhardness were 375 ± 37 MPa, 4.13 ± 0.45 MPa m1/2 and 14.1 ± 0.5 GPa, respectively.

AB - In this paper, gelcasting and pressureless sintering of YAG gel coated ZrB2-SiC (YZS) composite were conducted. YAG gel coated ZrB 2-SiC (YZS) suspension was firstly prepared through sol-gel route. Poly (acrylic acid) was used as dispersant. YZS suspension had the lowest viscosity when using 0.6 wt.% PAA as dispersant. Gelcasting was conducted based on AM-MBAM system. The gelcast YZS sample was then pressureless sintered to about 97% density. During sintering, YAG promoted the densification process from solid state sintering to liquid phase sintering. The average grain sizes of ZrB2 and SiC in the YZS composite were 3.8 and 1.3 μm, respectively. The flexural strength, fracture toughness and microhardness were 375 ± 37 MPa, 4.13 ± 0.45 MPa m1/2 and 14.1 ± 0.5 GPa, respectively.

KW - A. Ceramic-matrix composites (CMCs)

KW - B. Mechanical properties

KW - B. Microstructure

KW - E. Sintering

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DO - 10.1016/j.compositesb.2013.05.039

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SN - 1359-8368

VL - 54

SP - 307

EP - 312

JO - Composites Part B: Engineering

JF - Composites Part B: Engineering

IS - 1

ER -

Preparation of YAG gel coated ZrB₂-SiC composite prepared by gelcasting and pressureless sintering

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Keywords

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