Silicon Melt Infiltrated Ceramic Composites (HiPerComp™)

Corman, Gregory S.; Luthra, Krishan L.

doi:10.1007/0-387-23986-3_5

Cited by 93 publications

(100 citation statements)

References 6 publications

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“…SiC/SiC ceramic matrix composites [19] show large deviation from linear stress-strain relation in monotonic tensile tests. This strain softening is the result of formation of micro-cracks in the matrix material.…”

Section: Crack Band Failure Modelmentioning

confidence: 99%

Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites

Meyer

Waas

2015

Integr Mater Manuf Innov

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A mesh-objective two-scale finite element approach for analyzing damage and failure of fiber-reinforced ceramic matrix composites is presented here. The commercial finite element software suite Abaqus is used to generate macroscopic models, e.g., structural-level components or parts of ceramic matrix composites (CMCs), coupled with a second finite element code which pertains to the sub-scale at the fiber-matrix interface level, which is integrated seamlessly using user-generated subroutines and referred to as the integrated finite element method (IFEM). IFEM calculates the reaction of a microstructural sub-scale model that consists of a representative volume element (RVE) which includes all constituents of the actual material, e.g., fiber, matrix, and fiber/matrix interfaces, details of packing, and nonuniformities in properties. The energy-based crack band theory (CBT) is implemented within IFEM's sub-scale constitutive laws to predict micro-cracking in all constituents included in the model. The communication between the micro-and macro-scale is achieved through the exchange of strain, stress, and stiffness tensors. Important failure parameters, e.g., crack path and proportional limit, are part of the solution and predicted with a high level of accuracy. Numerical predictions are validated against experimental results.

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Section: Crack Band Failure Modelmentioning

confidence: 99%

Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites

Meyer

Waas

2015

Integr Mater Manuf Innov

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“…Prior to infiltration, the preforms were coated with pyrolytic carbon fiber coating (∼0.40 m thick) with boron carbide overlay (∼1.0 m thick) to decrease bonding between fibers and matrix. The composite had a finished fiber volume of ∼36.4% and a density of ∼2.40 g/cm 3 . The overall microstructure of the CMC is presented in Fig.…”

Section: Materials and Experimental Arrangementsmentioning

confidence: 99%

“…Because of their low density, high strength and fracture toughness at high temperatures SiC fiber-reinforced SiC matrix composites are currently being evaluated for aircraft engine hot-section components [1][2][3][4]. Since their constituents are intrinsically oxidation-prone, oxidation embrittlement is the most significant problem hindering SiC/SiC composites [5].…”

Section: Introductionmentioning

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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“…An alternate path toward high-temperature-capability materials involves the use of ceramic matrix composites. 28 As with superalloys, development efforts are split between improving mechanical properties and reducing manufacturing costs.…”

Section: Materials Opportunitiesmentioning

confidence: 99%

“…Table II summarizes typical water-quality requirements for cooling towers and the challenges posed by several nontraditional water resources. 28 Multiple technologies exist for improving nontraditional water quality:…”

Section: Energy and Water • Watermentioning

confidence: 99%

The energy–water nexus: Water use trends in sustainable energy and opportunities for materials research and development

Shapiro

2012

MRS Bull.

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Silicon Melt Infiltrated Ceramic Composites (HiPerComp™)

Cited by 93 publications

References 6 publications

Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites

Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites

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

The energy–water nexus: Water use trends in sustainable energy and opportunities for materials research and development

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Silicon Melt Infiltrated Ceramic Composites (HiPerComp™)

Cited by 93 publications

References 6 publications

Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites

Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites

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

The energy–water nexus: Water use trends in sustainable energy and opportunities for materials research and development

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