Tensile creep and fatigue of Sylramic-iBN melt-infiltrated SiC matrix composites: Retained properties, damage development, and failure mechanisms

Morscher, Gregory N.; Ojard, G.; Miller, Robert J.; Gowayed, Yasser; Santhosh, U.; Ahmad, Jalees; John, Reji

doi:10.1016/j.compscitech.2008.08.028

Cited by 115 publications

(62 citation statements)

References 12 publications

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“…Progressive matrix cracking exposes fibers to oxidizing environment and thus accelerates intrinsic fiber degradation. Moreover, once oxygen enters the matrix cracks, BN and SiC react to form gaseous species and solid borosilicate reaction products that bond exposed fibers together [4], causing fiber failures due to local stress concentration from load sharing created by strongly fused fibers.…”

Section: (A) and (B) For Syl/[sic+si 3 N 4 ] And Syl-ibn/[sic+si 3 N mentioning

confidence: 99%

Effects of Steam Environment on Fatigue Behavior of Two SiC/[SiC+Si3N4] Ceramic Composites at 1300°C

Ruggles‐Wrenn

Sharma

2010

Appl Compos Mater

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The fatigue behaviors of two SiC/[SiC+Si 3 N 4 ] ceramic matrix composites (CMC) were investigated at 1,300°C in laboratory air and in steam. Composites consisted of a crystalline [SiC+Si 3 N 4 ] matrix reinforced with either Sylramic™ or Sylramic-iBN fibers (treated Sylramic™ fibers that possess an in situ BN coating) woven in a five-harness satin weave fabric and coated with a proprietary boron-containing dual-layer interphase. The tensile stress-strain behaviors were investigated and the tensile properties measured at 1,300°C. Tension-tension fatigue behaviors of both CMCs were studied for fatigue stresses ranging from 100 to 180 MPa. The fatigue limit (based on a run-out condition of 2×10 5 cycles) in both air and steam was 100 MPa for the CMC containing Sylramic™ fibers and 140 MPa for the CMC reinforced with Sylramic-iBN fibers. At higher fatigue stresses, the presence of steam caused noticeable degradation in fatigue performance of both composites. The retained strength and modulus of all run-out specimens were characterized. The materials tested in air retained 100% of their tensile strength, while the materials tested in steam retained only about 90% of their tensile strength.

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Section: (A) and (B) For Syl/[sic+si 3 N 4 ] And Syl-ibn/[sic+si 3 N mentioning

confidence: 99%

Effects of Steam Environment on Fatigue Behavior of Two SiC/[SiC+Si3N4] Ceramic Composites at 1300°C

Ruggles‐Wrenn

Sharma

2010

Appl Compos Mater

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“…Such measurements include those via optical microscopy (108)(109)(110)(111)(112)(113), scanning electron microscopy (114-119), speckle interferometry (120)(121)(122), acoustic waves (123)(124)(125), and electrical resistance (126,127). Most of these measurements were at room temperature; only a few studies tackled in situ measurements at high temperatures (e.g., References 114 and 128).…”

Section: Test Data: the High-temperature Challengementioning

confidence: 99%

Stochastic Virtual Tests for High-Temperature Ceramic Matrix Composites

Cox

Bale

Begley

et al. 2014

Annu. Rev. Mater. Res.

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We review the development of virtual tests for high-temperature ceramic matrix composites with textile reinforcement. Success hinges on understanding the relationship between the microstructure of continuous-fiber composites, including its stochastic variability, and the evolution of damage events leading to failure. The virtual tests combine advanced experiments and theories to address physical, mathematical, and engineering aspects of material definition and failure prediction. Key new experiments include surface image correlation methods and synchrotron-based, micrometer-resolution 3D imaging, both executed at temperatures exceeding 1,500• C. Computational methods include new probabilistic algorithms for generating stochastic virtual specimens, as well as a new augmented finite element method that deals efficiently with arbitrary systems of crack initiation, bifurcation, and coalescence in heterogeneous materials. Conceptual advances include the use of topology to characterize stochastic microstructures. We discuss the challenge of predicting the probability of an extreme failure event in a computationally tractable manner while retaining the necessary physical detail. 17.1

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“…These non-oxide CMCs have excellent high-temperature mechanical properties and retain these properties well, for the most part. SiC/SiC CMCs have been evaluated and tested in hot-section components of turbine engines [29,72] and are also being considered for other high temperature aerospace applications such as leading edges on hypersonic vehicles due to their superior creep performance and the high strength of SiC fibers. These high-temperature oxidizing environments demand materials that are thermodynamically stable and oxidation resistant.…”

Section: Ceramic Matrix Compositesmentioning

confidence: 99%

Creep of Hi-Nicalon S Ceramic Fiber Tows at 800 deg C in Air and in Silicic Acid-Saturated Steam

Robertson¹

2015

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Tensile creep and fatigue of Sylramic-iBN melt-infiltrated SiC matrix composites: Retained properties, damage development, and failure mechanisms

Cited by 115 publications

References 12 publications

Effects of Steam Environment on Fatigue Behavior of Two SiC/[SiC+Si3N4] Ceramic Composites at 1300°C

Effects of Steam Environment on Fatigue Behavior of Two SiC/[SiC+Si3N4] Ceramic Composites at 1300°C

Stochastic Virtual Tests for High-Temperature Ceramic Matrix Composites

Creep of Hi-Nicalon S Ceramic Fiber Tows at 800 deg C in Air and in Silicic Acid-Saturated Steam

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