Journal ArticleDOI
Creep investigations of alumina-based all-oxide ceramic matrix composites
TLDR
In this article, the long-term tensile creep behavior of all-oxide ceramic matrix composites (CMCs) was investigated and the accompanying fiber bundle tests revealed a strong influence of processing conditions on the creep resistance.Abstract:
The long-term tensile creep behavior of all-oxide ceramic matrix composites (CMCs) was investigated. The accompanying fiber bundle tests revealed a strong influence of processing conditions on the creep resistance. CMCs with perpendicular fiber orientations were tested under two different load directions, moreover CMCs with nearly unidirectional fiber texture were investigated. Depending on the conditions, the absence of a steady-state creep stage was observed in most cases and due to an early onset of damage. As the majority of the samples was tested up to high strains and rupture, different failure mechanisms could be evaluated. An attempt was made to estimate fiber controlled creep rates via bundle data, but this approach also revealed problems when elastic data from unidirectional composites are transferred to CMCs with more complex fiber architecture.read more
Citations
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Journal ArticleDOI
Influence of composite powders’ microstructure on the microstructure and properties of Al2O3–TiO2 coatings fabricated by plasma spraying
TL;DR: In this article, the influence of nano-composite microstructure on nano-coating and properties of alumina-titania composite powders was investigated, and two types of microstructures formed in the two nano-components were formed by nanocomposite powders during plasma spraying.
Journal ArticleDOI
Creep and microstructure of Nextel™ 720 fiber at elevated temperature in air and in steam
TL;DR: In this article, the authors investigated the creep of Nextel™ 720 alumina-mullite fiber tows at 1100 and 1200°C for tensile stresses of 100-400MPa in air and in steam.
Journal ArticleDOI
Tension-compression fatigue of an oxide/oxide ceramic composite at elevated temperature
TL;DR: In this article, a tension-compression fatigue behavior of an oxide-oxide ceramic-matrix composite was investigated at 1200°C in air and in steam at a frequency of 1.0 Hz.
Journal ArticleDOI
Creep of Nextel™ 610 Fiber at 1100°C in Air and in Steam
TL;DR: In this paper, a linear elastic crack growth model was used to predict the creep lifetimes from the constant loading rate data and the effect of loading rate on fiber tensile strength was also explored.
Journal ArticleDOI
Creep mechanisms and microstructure evolution of Nextel™ 610 fiber in air and steam
TL;DR: In this paper, the authors measured the creep rates of Nextel™ 610 alumina fibers at 1100°C and 100-500 MPa in air and steam, respectively, and quantified the contributions of pore growth and grain elongation to creep strain.
References
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Book
Ceramics: Mechanical Properties, Failure Behaviour, Materials Selection
Dietrich Munz,Theo Fett +1 more
TL;DR: In this paper, the authors proposed a method for the determination of the Mode-I Fracture Toughness KIc (KIc) of a porosity-based tensile pipe.
Book
Alumina: Processing, Properties, and Applications
Erhard Dorre,E. Dörre,H. Hübner +2 more
TL;DR: In this article, the authors present an overview of the history of the use and behavior of aluminomethane and discuss its application in a variety of applications, including medical applications.
Journal ArticleDOI
Developments in Oxide Fiber Composites
TL;DR: In this paper, the authors present a synopsis of the current understanding of oxide composites as well as to identify outstanding issues that require resolution for successful implementation, focusing on material systems and microstructural concepts that lead to high toughness and long-term durability.
Journal ArticleDOI
High performance oxide fibers for metal and ceramic composites
David M. Wilson,L.R Visser +1 more
TL;DR: In this article, a family of oxide fibers, Nextel™ 610, 650 and 720, was developed specifically for the reinforcement of metal and ceramic matrix composites, and the strength of both single filaments and multi-filament rovings of Nextel610, 650, and 720 fibers was determined between 25 and 250mm gauge length.
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