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Featured researches published by Haiyan Du.


RSC Advances | 2014

Structure formation process, heat-insulation property and cyclic compression–resilience performance of mullite fibres/whiskers frameworks

Shan Liu; Jiachen Liu; Haiyan Du; Feng Hou; Sue Ren; Haitao Geng

Mullite fibres/whiskers frameworks (MF/MW frameworks) were prepared by mixed-slurry-filtration and heat-treating. Hierarchical fibres/whiskers structure formed in the frameworks through fluorine-catalyzed gas-phase reaction. Topaz rods as a transient product first formed in the frameworks, and then gradually transformed into mullite whiskers. Intersected mullite whiskers served as lap-jointing points of the fibres. The volume density, apparent porosity and thermal conductivity of the samples heat-treated at 1100–1500 °C were 0.402–0.541 g cm−3, 81.2–85% and 0.1191–0.1647 W m−1 k−1, respectively. Cyclic compression–resilience performance (maximum stress = 0.4 MPa) of the samples was tested at room temperature. The compression ratio, permanent deformation ratio and resilience ratio of the samples in the first circle compression–resilience test were 2.031–3.833%, 0.125–0.042% and 93.85–98.28%, respectively. The excellent thermal/mechanical properties indicated that the MF/MW frameworks were suitable for being applied as high temperature heat-insulation/sealing materials.


RSC Advances | 2014

Joining of silicon carbide by a heat-resistant phosphate adhesive

Mingchao Wang; Jiachen Liu; Haiyan Du; Feng Hou; Anran Guo; Yingna Zhao; Jing Zhang

In this paper, SiC was bonded with a phosphate inorganic adhesive prepared from H3PO4 and Al(OH)3 as the matrix and Si and B4C as the inorganic fillers. The properties of the obtained adhesive were analyzed by XRD, TG-DSC, IR, shear strength tests and SEM. The results showed that the phosphate adhesive exhibited outstanding heat-resistant properties and excellent bonding strength. The addition of B4C could greatly improve the adhesives mechanical properties due to the formation of borosilicate glass and the volume compensation came from B4Cs oxidation. The shear strength of bonded specimens could be up to about 10 MPa after heat treatment at 1300 °C, attributed to the generation of mullite and borosilicate as well as the reasonable compensation for the adhesives volume.


Journal of The European Ceramic Society | 2013

Fabrication and properties of mullite fiber matrix porous ceramics by a TBA-based gel-casting process

Zhenguang Hou; Haiyan Du; Jiachen Liu; Ruihua Hao; Xue Dong; Mengxia Liu


Ceramics International | 2012

Preparation of self-reinforcement of porous mullite ceramics through in situ synthesis of mullite whisker in flyash body

Shihui Li; Haiyan Du; Anran Guo; Hai Xu; Duo Yang


Ceramics International | 2013

Preparation of porous Y2SiO5 ceramics with relatively high compressive strength and ultra-low thermal conductivity by a TBA-based gel-casting method

Zhenguang Hou; Jiachen Liu; Haiyan Du; Hai Xu; Anran Guo; Min Wang


Composites Science and Technology | 2014

Mechanical behavior of fibrous ceramics with a bird’s nest structure

Xue Dong; Guofa Sui; Jiachen Liu; Anran Guo; Sue Ren; Mingchao Wang; Haiyan Du


Ceramics International | 2012

Effect of fly ash cenospheres on the microstructure and properties of silica-based composites

Caifen Wang; Jiachen Liu; Haiyan Du; Anran Guo


Ceramics International | 2014

Joining of C/C composites by using B4C reinforced phosphate adhesive

Mingchao Wang; Jiachen Liu; Haiyan Du; Feng Hou; Anran Guo; Shan Liu; Xue Dong


Journal of Alloys and Compounds | 2015

A SiC whisker reinforced high-temperature resistant phosphate adhesive for bonding carbon/carbon composites

Mingchao Wang; Jiachen Liu; Haiyan Du; Anran Guo; Xin Tao; Xue Dong; Haitao Geng


Ceramics International | 2012

Porous silica ceramics with relatively high strength and novel bi-modal pore structure prepared by a TBA-based gel-casting method

Hai Xu; Jiachen Liu; Anran Guo; Haiyan Du; Zhengguang Hou

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