Microstructure and flexural properties of multilayered fiber-reinforced oxide composites fabricated by a novel lamination route

Guglielmi, Paula O.; Blaese, Diego; Hablitzel, Murilo P.; Nunes, Gabriel Ferreira; Lauth, Victor R.; Hotza, Dachamir; Al-Qureshi, H. A.; Janßen, Rolf

doi:10.1016/j.ceramint.2015.02.120

Cited by 36 publications

(18 citation statements)

References 27 publications

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“…For such applications, high‐performance oxide fibers, including Nextel™ 610 and Nextel™ 720, are used as reinforcing fibers 1,2 . These reinforcements are mainly used as continuous fibers, in the form of woven fabrics, 2–12 unidirectional (UD) layers, 13–15 or braiding 4,16 . However, only few studies 17–22 dealt with Nextel™ 610 short fiber‐reinforced oxide ceramics.…”

Section: Introductionmentioning

confidence: 99%

Short fiber‐reinforced oxide fiber composites

Winkelbauer

Puchas

Schafföner

et al. 2021

Int J Applied Ceramic Tech

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This paper presents a novel fiber spraying process for the manufacturing of short fiber bundle‐reinforced Nextel™ 610/Al2O3‐ZrO2 oxide fiber composites (SF‐OFC) and its characterization. First, the influence of varying fiber lengths (7, 14, and 28 mm, continuous fibers) and fiber orientations (unidirectional 0°, quasi‐isotropic, ±45°) was investigated using hand‐laid SF‐OFC. Due to the weak matrix, the hand‐laid material exhibited a strongly fiber‐dominated material behavior, that is, variations in fiber length and orientation had a strong influence on the material properties. Second, the automated sprayed SF‐OFC, however, exhibited a random orientation of the fiber bundles, which resulted in in‐plane isotropic material properties. Average bending strengths of up to 177 MPa, strains of .39%, and a quasi‐ductile fracture behavior were achieved. The strain was, therefore, in the range of fabric‐reinforced OFC. While the bending strength of the SF‐OFC was somewhat lower than that of fabric‐reinforced OFC with the fiber orientation parallel to the loading direction, it was more than two times higher than the strength in 45° direction relative to the fabric reinforcement. Combined with good drapability and lower material costs compared to fabric‐reinforced OFC, SF‐OFC is, therefore, a promising material for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Short fiber‐reinforced oxide fiber composites

Winkelbauer

Puchas

Schafföner

et al. 2021

Int J Applied Ceramic Tech

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“…Guglielmi et al [ 41 ] have shown that the ILSS could also be increased by matrix densification due to annealing, albeit not all samples failed under interlaminar shear afterwards. The ILSS strongly depends on the material system and processing parameters, such as sintering time and temperature, i.e., the comparison of ILSS values is not always straightforward, especially since there can be a trade-off between ILSS and other strength values, such as tensile strength.…”

Section: Resultsmentioning

confidence: 99%

Process Chain Development for the Fabrication of Three-Dimensional Braided Oxide Ceramic Matrix Composites

et al. 2021

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Fiber composites with a three-dimensional braided reinforcement architecture have higher fiber volume content and Z-fiber content compared to a two-dimensional braided reinforcement architecture; as a result, the shear strength increases. Porous oxide fiber composites (OFCs) have the inherent weakness of a low interlaminar shear strength, which can be specifically increased by the use of a three-dimensional fiber reinforcement. In this work, the braiding process chain for processing highly brittle oxide ceramic fibers is modified; as a consequence, a bobbin, which protects the filament, is developed and quantitatively evaluated on a test rig with regard to tension and filament breakage. Subsequently, a braiding process is designed which takes into account fiber-protecting aspects, and a three-dimensional reinforced demonstrator is produced and tested. After impregnation with an Al2O3-ZrO2 slurry, by either a prepreg process or a vacuum-assisted process, as well as subsequent sintering, the three-dimensional braid-reinforced OFC exhibits an interlaminar shear strength (ILSS) which is higher than that of two-dimensional braid- or fabric-reinforced samples by 64–95%. The influence of the manufacturing process on the relative macropore content is investigated and correlated with the mechanical properties.

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“…Recently water based tape casting process has been used, in order to avoid the toxic effects produced by organic solvents [11][12]. The use of alumina and zirconia as the constituent materials of ceramic laminates can be related to the excellent bonding between the layers in the absence of excessive diffusion between components, their good thermo-mechanical properties and their relatively ease of processing [13][14]. These characteristics make the two materials interesting candidates for the manufacture of ceramic laminates.…”

Section: Introductionmentioning

confidence: 99%

Nano-structured Alumina-ZrO2 ceramic laminates

Acchar

Junior

2019

Matéria (Rio J.)

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In the last years many efforts have been expended to develop colloidal process that uses water instead of organic solvents in the tape casting process. In present work, alumina/zirconia laminated nanocomposites were fabricated by layer-by-layer method and using water-based tape casting process. Physical and mechanical properties as well as the fracture mode were investigated. The laminates consisted of stacked alumina and zirconia green sheets produced by thermopressing. The ceramic laminates were first heated at 450°C (organic elimination) and subsequently sintered in air at 1500°C during 1 h. The ceramic laminates showed a mechanical strength of approximately 103 MPa (AZAZA) and 44 MPa (ZAZAZ), respectively and an intergranular-transgranular mixed fracture mode.

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Microstructure and flexural properties of multilayered fiber-reinforced oxide composites fabricated by a novel lamination route

Cited by 36 publications

References 27 publications

Short fiber‐reinforced oxide fiber composites

Short fiber‐reinforced oxide fiber composites

Process Chain Development for the Fabrication of Three-Dimensional Braided Oxide Ceramic Matrix Composites

Nano-structured Alumina-ZrO2 ceramic laminates

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