Hard, tough and strong ZrO2–WC composites from nanosized powders

Anné, Guy; Put, Stijn; Vanmeensel, Kim; Jiang, Dianlu; Zhang, Fei; Biest, Omer Van der

doi:10.1016/j.jeurceramsoc.2004.01.015

Cited by 78 publications

(29 citation statements)

References 19 publications

(17 reference statements)

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“…The presence of rigid particles of Al 2 O 3 or ZrO 2 in the LZSA glass material probably reduces the mobility of the LZSA grain boundaries during the sintering process and prevents full densification. Similar behavior was also founded for other composite systems such as Al 2 O 3 + carbides [6,9,11] and ZrO 2 +WC [13]. Contrary to that, the reinforcing materials show an improvement of the densification by increasing the temperature.…”

Section: Methodssupporting

confidence: 77%

Using ZrO2 or Al2O3 particles to enhance the mechanical properties of a LZSA glass-ceramic matrix

2009

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Investigations of a range of glass ceramic compositions have been developed in the last decades. These materials show a good potential to be used at room temperature as a substitute to other ceramic materials, due to their lower sintering temperature and costs. The mainly reason that limits the use of these materials is their low mechanical strength. In this work a Li 2 O-ZrO 2 -SiO 2 -Al 2 O 3 (LZSA) glass powder was mixed with 30 wt. % of ZrO 2 or Al 2 O 3 (submicron size), uniaxially pressed under 40 MPa and sintered at 650 °C/30 min. In some samples a second sintering step at 1000 °C during 30 minutes was also performed, in order to improve the mechanical properties by increasing the crystallized fraction. The sintered samples were characterized by bending strength measurements, X-ray diffraction and scanning electron microscopy analyses. Apparent densities values were determined by the Archimedes's method. The results obtained in this work indicate that the addition of ZrO 2 and Al 2 O 3 (reinforcing particles) decreases the density of the glass-ceramic materials. X-ray diffraction analysis indicated an increase of the crystallized fraction in samples sintered at 1000 °C. Fracture strength values has showed to be dependent on the sintering temperature and also on the reinforcing crystalline particles.

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Section: Methodssupporting

confidence: 77%

Using ZrO2 or Al2O3 particles to enhance the mechanical properties of a LZSA glass-ceramic matrix

2009

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“…6b), in most cases, crack deflection occurred near the ZrB 2 -SiC interfaces or ZrB 2 -ZrB 2 interfaces, whose average grain size of ZrB 2 was about 2-4 m. The indentation crack path appeared the most tortuous in the four composites. The more tortuous crack path was a qualitative indication that more energy was absorbed and a reduction of crack driving force during crack propagation, which led to the improvement of toughness [4,20].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effects of Y2O3 on microstructure and mechanical properties of ZrB2–SiC ceramics

Zhang

Han

et al. 2008

Journal of Alloys and Compounds

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“…Anne et al [5] prepared Yttria-stabilised zirconia (Y-TZP) based composites with carbide (WC) content up to 50 vol.% from nanopowders by means of conventional hot pressing. The mechanical properties were investigated as a function of the WC content.…”

Section: Introductionmentioning

confidence: 99%

The Development and Characterization of Zirconia-Silica Sand Nanoparticles Composites

Ahmad¹,

Mamat²

2011

WJNSE

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The present study aims to develop zirconia-Silica sand nanoparticles composites through powder processing route and to study the physical properties, mechanical properties and microstructure of the composites. Zirconia based silica sand nanoparticles composite with 5, 10, 15 and 20 wt.% were developed through powder processing technique and sintered at 1500℃ for two hours. A decreasing trend of green density however an improvement in sintered density was observed. Also the addition of silica sand nanoparticles with 20 wt.% increased the hardness up to 12.45 GPa and microstructures indicated the diffusion mechanism of silica sand nanoparticles into pore sites of the composites.

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Hard, tough and strong ZrO2–WC composites from nanosized powders

Cited by 78 publications

References 19 publications

Using ZrO2 or Al2O3 particles to enhance the mechanical properties of a LZSA glass-ceramic matrix

Using ZrO2 or Al2O3 particles to enhance the mechanical properties of a LZSA glass-ceramic matrix

Effects of Y2O3 on microstructure and mechanical properties of ZrB2–SiC ceramics

The Development and Characterization of Zirconia-Silica Sand Nanoparticles Composites

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