Blackglas™-Nicalon™ Composites with CVD Boron Nitride Fiber Interface Coatings

Gonczy, S. T.; Butler, E.P.; Khasgiwale, N.R.; Tsakalakos, Loucas; Cannon, W. Roger; Danforth, S.C.

doi:10.1002/9780470314715.ch48

Cited by 4 publications

(1 citation statement)

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“…BN coating was selected because it was reported to have good high-temperature stability for interfacial coating. [11][12][13] The high-temperature stability of the HNSiC fiber allowed chemical vapor deposition (CVD) of the BN coating, in comparison to the CGSiC fiber. Details of the chemical composition and the appearance of the coating were reported elsewhere.…”

Section: Methodsmentioning

confidence: 99%

Strength of a Hi‐Nicalon™/Silicon‐Carbide‐Matrix Composite Fabricated by the Multiple Polymer Infiltration‐Pyrolysis Process

Takeda

Kagawa

Mitsuno³

et al. 1999

Journal of the American Ceramic Society

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A woven‐fabric Hi‐Nicalon™‐fiber reinforced SiC‐matrix composite has been fabricated by using a multiple polymer infiltration‐pyrolysis (PIP) process. The three‐point bend strength, at room temperature, of the composite is examined as a function of total porosity of the composite. The porosity of the composite decreases as the number of PIP cycles (N) increases. Both the proportional‐limit load and the maximum load in the three‐point bend test increase as N increases. A compressive fracture mode is observed for N < 10 (total porosity of >10%), and a tensile fracture mode is observed for N greaterthan equal to 10 (total porosity of lessthan equal to10%). For the composite with N= 14, with a total porosity of 8 vol%, a proportional‐limit stress of 410 MPa and a maximum stress of 600 MPa are achieved.

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Section: Methodsmentioning

confidence: 99%