Development of ZrO2–WC composites by pulsed electric current sintering

Huang, Shuigen; Vanmeensel, Kim; Biest, Omer Van der; Zhang, Fei

doi:10.1016/j.jeurceramsoc.2006.11.079

Cited by 30 publications

(15 citation statements)

References 16 publications

(20 reference statements)

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“…The toughness values of composites obtained from horizontal milled powders and high-energy ball milled powders are 10 and 11 MPa·m 1/2 , respectively. The hardness and fracture toughness of ZrO 2 have been reported as 11.8 GPa and 6.5 MPa·m 1/2 , respectively [17]. The hardness of the Fe-ZrO 2 composite is lower than that of monolithic ZrO 2 , but the fracture toughness is higher than that of ZrO 2 due to the addition of ductile Fe.…”

Section: Resultsmentioning

confidence: 99%

Properties and rapid low-temperature consolidation of nanocrystalline Fe-ZrO2 composite by pulsed current activated sintering

Kang

Yoon

et al. 2011

Met. Mater. Int.

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Nanopowders of Fe and ZrO 2 were synthesized from Fe 2 O 3 and Zr by high-energy ball milling. The powder sizes of Fe and ZrO 2 were 70 nm and 12 nm, respectively. Highly dense nanostructured 4/3Fe-ZrO 2 composite was consolidated by a pulsed current activated sintering method within 1 minute from the mechanically synthesized powders (Fe-ZrO 2 ) and horizontal milled Fe 2 O 3 +Zr powders under the 1 GPa pressure. The grain sizes of Fe and ZrO 2 in the composite were calculated. The average hardness and fracture toughness values of nanostuctured 4/3Fe-ZrO 2 composite were investigated.

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Section: Resultsmentioning

confidence: 99%

Properties and rapid low-temperature consolidation of nanocrystalline Fe-ZrO2 composite by pulsed current activated sintering

Kang

Yoon

et al. 2011

Met. Mater. Int.

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“…1 wt.% Al 2 O 3 (Grade SM8, Baikowski, France) was added to the mixture as sintering additive [1][2][3]. The ZrO 2 grade was prepared by mixing 3 mol.% Y 2 O 3 -ZrO 2 (grade HSY-3U, Daiichi, Japan, 30 nm) and monoclinic ZrO 2 (grade TZ-0, Tosoh, Japan, 27 nm) powders.…”

Section: Methodsmentioning

confidence: 99%

“…However, the poor thermal stability of the Co binder largely limits the application as a structural component where a high temperature strength, oxidation, and corrosion resistance are required. Previous investigations report that ZrO 2 -WC composites exhibit comparable mechanical properties as WC-Co materials, which provides an opportunity to partially replace traditional WC-Co materials for some applications [1][2][3]. In earlier works, attention was mainly emphasized on determining the optimum ZrO 2 and stabilizer content of ZrO 2 -WC composites made by hot pressing [1][2] or pulsed electric current sintering (PECS) [3] and PECS of ZrO 2 -toughened WC composites [4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Previous investigations report that ZrO 2 -WC composites exhibit comparable mechanical properties as WC-Co materials, which provides an opportunity to partially replace traditional WC-Co materials for some applications [1][2][3]. In earlier works, attention was mainly emphasized on determining the optimum ZrO 2 and stabilizer content of ZrO 2 -WC composites made by hot pressing [1][2] or pulsed electric current sintering (PECS) [3] and PECS of ZrO 2 -toughened WC composites [4][5]. Optimal mechanical properties and electrical conductivity were found for ZrO 2 based composites containing 40 vol.% WC and stabilized with 2 mol.% Y 2 O 3 [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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Sintering, thermal stability and mechanical properties of ZrO2-WC composites obtained by pulsed electric current sintering

et al. 2011

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ZrO 2 -WC composites exhibit comparable mechanical properties as traditional WC-Co materials, which provides an opportunity to partially replace WC-Co for some applications. In this study, 2 mol.% Y 2 O 3 stabilized ZrO 2 composites with 40 vol.% WC were consolidated in the 1150°C-1850°C range under a pressure of 60 MPa by pulsed electric current sintering (PECS). The densification behavior, microstructure and phase constitution of the composites were investigated to clarify the role of the sintering temperature on the grain growth, mechanical properties and thermal stability of ZrO 2 and WC components. Analysis results indicated that the composites sintered at 1350°C and 1450°C exhibited the highest tetragonal ZrO 2 phase transformability, maximum toughness, and hardness and an optimal flexural strength. Chemical reaction of ZrO 2 and C, originating from the graphite die, was detected in the composite PECS for 20 min at 1850°C in vacuum.

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“…ZrO 2 has a density of 5.98 g cm -3 , a Young's modulus of 210 GPa, excellent oxidation resistance, and good hightemperature mechanical properties [1,2]. Cu has a density of 8.9 g cm -3 , a Young's modulus of 130 GPa, and good fracture toughness [2].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and rapid low-temperature consolidation of nanocrystalline Cu-ZrO2 composites by pulsed current activated heating

et al. 2015

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Metal-ceramic compositr can be obtained with an optimum combination of low density, high oxidation resistance, and high hardness of the ceramic and toughness of the metal. Therefore, metal matrix composites are recognized as candidates for aerospace, automotive, biomaterials, and defense applications. Despite its many attractive properties, the low fracture toughness of ZrO2 limits its wide application. One of the most obvious tactics to improve the mechanical properties has been to fabricate a nanostructured material and composite material. Nano-powders of Cu and ZrO2 were synthesized from 2CuO and Zr powders by high-energy ball milling. Nanocrystalline 2Cu-ZrO2 composite was consolidated within 5 minutes from mechanically synthesized powders of ZrO2 and 2Cu at low temperature, by a pulsed current activated sintering method. The relative density of the composite was 98.5%. The fracture toughness of 2Cu-ZrO2 composite in this study is higher than that of monolithic ZrO2, without great decrease of hardness.

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Development of ZrO2–WC composites by pulsed electric current sintering

Cited by 30 publications

References 16 publications

Properties and rapid low-temperature consolidation of nanocrystalline Fe-ZrO2 composite by pulsed current activated sintering

Properties and rapid low-temperature consolidation of nanocrystalline Fe-ZrO2 composite by pulsed current activated sintering

Sintering, thermal stability and mechanical properties of ZrO2-WC composites obtained by pulsed electric current sintering

Mechanical properties and rapid low-temperature consolidation of nanocrystalline Cu-ZrO2 composites by pulsed current activated heating

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