Alumina-Reinforced Zirconia Composites

Choi, Sung R.; Bansal, Narottam P.

doi:10.1007/0-387-23986-3_18

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Table I summarizes the density and fracture strength of the monolithic zirconia, CNFs, and the ZrO 2 /CNFs composites sintered by SPS at 1200° and 1500°C, respectively. It is worth noting that monolithic zirconia sintered by SPS either at 1200° or 1500°C shows almost the same fracture strength value and close to the theoretical value for zirconia (1200 MPa) 34 . In the literature, it can be found that optimum sintering temperature by SPS for this type of materials is around 1200°C 35 .…”

Section: Resultssupporting

confidence: 67%

Improvement of Carbon Nanofibers/ZrO₂ Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Borrell

Rocha

Torrecillas

et al. 2011

Journal of the American Ceramic Society

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The development of new carbon nanofibers-ceramic nanocomposite materials with excellent mechanical, thermal and electrical properties is interesting for a wide range of industrial applications. Among the ceramic materials, zirconia stands out for their excellent mechanical properties. The main limitations in the preparation of this kind of nanocomposites are related with the difficulty in obtaining materials with homogeneous distribution of both phases and the different chemical nature of CNFs and ZrO2 which causes poor interaction between them. CNFs-reinforced zirconia nanocomposites ZrO2/xCNFs (x=1-20 vol.%) were prepared by powder mixture and sintered by spark plasma sintering (SPS). ZrO2-reinforced carbon nanofibers nanocomposites CNFs/xZrO2 (x=20 vol.%) were prepared by powder mixture and a surface coating of CNFs by wet chemical route with zirconia precursor is proposed as a very effective way to improve the interaction between CNFs and ZrO2. After SPS sintering an improvement of 50% in fracture strength was found for similar 2 nanocomposite compositions when the surface coating was used. The improved mechanical properties of these nanocomposites are caused by stronger interaction between the CNFs and ZrO2.

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Section: Resultssupporting

confidence: 67%

Improvement of Carbon Nanofibers/ZrO₂ Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Borrell

Rocha

Torrecillas

et al. 2011

Journal of the American Ceramic Society

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“…However, due to the inherent material defects in the matrix-rich or fiber-matrix interface regions, fiber-reinforced woven CMCs are often susceptible to failure under interlaminar tensile or shear stress. The interlaminar failure or delamination may cause the loss of stiffness and accelerate structural failure of the CMC component [28,29]. Therefore a thorough understanding of the performance of SiC/SiC composites under interlaminar stresses in service environments is critical to design and life prediction for these materials.…”

Section: Matec Web Of Conferencesmentioning

confidence: 99%

“…Choi et al [28][29][30][31][32] evaluated high-temperature behavior in interlaminar shear of SiC/BSAS, SiC/MAS, C/SiC, and Hi-Nicalon™/SiC composites using double notch shear (DNS) specimens. Interlaminar shear strength (ILSS) values of 30-50 MPa were reported.…”

Section: Matec Web Of Conferencesmentioning

confidence: 99%

Creep behavior in interlaminar shear of a Hi-Nicalon^TM/ SiC-B₄C composite at 1200^∘C in air and in steam

Ruggles‐Wrenn

Pope

2015

MATEC Web of Conferences

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Abstract. Creep behavior in interlaminar shear of a non-oxide ceramic composite with a multilayered matrix was investigated at 1200 • C in laboratory air and in steam environment. The composite was produced via chemical vapor infiltration (CVI). The composite had an oxidation inhibited matrix, which consisted of alternating layers of silicon carbide and boron carbide and was reinforced with laminated Hi-Nicalon™ fibers woven in a five-harness-satin weave. Fiber preforms had pyrolytic carbon fiber coating with boron carbon overlay applied. The interlaminar shear properties were measured. The creep behavior was examined for interlaminar shear stresses in the 16-22 MPa range. Primary and secondary creep regimes were observed in all tests conducted in air and in steam. In air and in steam, creep run-out defined as 100 h at creep stress was achieved at 16 MPa. Similar creep strains were accumulated in air and in steam. Furthermore, creep strain rates and creep lifetimes were only moderately affected by the presence of steam. The retained properties of all specimens that achieved run-out were characterized. Composite microstructure, as well as damage and failure mechanisms were investigated. The tested specimens were also examined using electron probe microanalysis (EPMA) with wavelength dispersive spectroscopy (WDS). Analysis of the fracture surfaces revealed significant surface oxidation, but only trace amounts of boron and carbon. Cross sectional analysis showed increasing boron concentration in the specimen interior.

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High‐Emperature Thermal Conductivity of Alumina‐Reinforced Zirconia Composites

Bansal

Zhu

2006

Ceramic Transactions Series

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Alumina-Reinforced Zirconia Composites

Cited by 5 publications

References 18 publications

Improvement of Carbon Nanofibers/ZrO₂ Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Improvement of Carbon Nanofibers/ZrO₂ Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Creep behavior in interlaminar shear of a Hi-Nicalon^TM/ SiC-B₄C composite at 1200^∘C in air and in steam

High‐Emperature Thermal Conductivity of Alumina‐Reinforced Zirconia Composites

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Alumina-Reinforced Zirconia Composites

Cited by 5 publications

References 18 publications

Improvement of Carbon Nanofibers/ZrO2 Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Improvement of Carbon Nanofibers/ZrO2 Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Creep behavior in interlaminar shear of a Hi-NicalonTM/ SiC-B4C composite at 1200∘C in air and in steam

High‐Emperature Thermal Conductivity of Alumina‐Reinforced Zirconia Composites

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Improvement of Carbon Nanofibers/ZrO₂ Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Improvement of Carbon Nanofibers/ZrO₂ Composites Properties with a Zirconia Nanocoating on Carbon Nanofibers by Sol–Gel Method

Creep behavior in interlaminar shear of a Hi-Nicalon^TM/ SiC-B₄C composite at 1200^∘C in air and in steam