Continuous fiber reinforced ceramic composites

Following the multiple matrix cracking, the composite can continue to carry the load until fiber failure. The ultimate tensile strengths of several continuous fiber-reinforced ceramic composites versus temperatures are shown in Fig. 

L T Zhang, L F Cheng, Y D Xu and D X Li, investigation on interfacial zone in continuous fiber-reinforced ceramic composites, pp. 170-175, 2005, with permission from Xibei Youse Jinshu Yanjiuyuan. 

CFCC continuous fiber-reinforced ceramic composite... 

FIGURE 6-8 A schematic representation of matrix cracking on exposure to stresses above the matrix eraeking strength in continuous fiber-reinforced ceramic composites. Source Luthra, 1997b. 

Fatigue Behavior of Continuous Fiber-Reinforced Ceramic Matrix Composites... 

The model proposed by Rouby and Reynaud46 represents the first systematic approach for understanding how the microstructural damage governs the fatigue life of continuous fiber-reinforced ceramic matrix composites. This model will be used to explain various aspects of fatigue failure in the remaining portion of this chapter. 

Experimental studies of the influence of stress ratio on elevated temperature fatigue life have been conducted by Suresh71 for whisker-reinforced AI2O3 (see Chapter 7 by Suresh for a discussion of the fatigue behavior of whisker-reinforced ceramics). In this section, the influence of stress ratio on the fatigue life of continuous fiber-reinforced ceramic matrix composites is discussed. 

Bowman, K. J. et al. (Ed.) 1995. Handbook on Continuous Fiber-Reinforced Ceramic Matrix Composites. Am. Ceram. Soc., Westerville, Ohio. 

As fiber is a primary component in continuous fiber reinforced ceramic matrix composites, its characteristic is an important factor that confines the thermal conductivity of the composites. The ideal SiC fiber should be highly crystalline, oxygen-free, and stoichiometric. As shows in Table I,... 

Wagner O (1991) Diploma Thesis, University of Bonn, Germany Baldus HP, Passing G, Sporn D, Jansen M, Goring J (1997) Key Eng Mater 127/131 177 DiCarlo JA, Dutta S (1995) Continuous ceramic fibers for ceramic matrix composites. In Lehmann R, El-Rahaiby S, Wachtmann J (eds) Handbook on Continuous Fiber Reinforced Ceramic Matrix Composites. Ceramic Information Analysis Center, Purdue University, IN, p 140... 

J.A. DiCarlo and S. Dutta, Continuous Ceramic Fibers for Ceramic Composites, Handbook On Continuous Fiber Reinforced Ceramic Matrix Composites Eds R. Lebman, S. El-Rahaiby, and J. Wachtman, Jr., CIAC, Purdue University, WestLafayette, Indiana, 1995, p. 137—183. 

R. L. Lehman, Glass and Glass-Ceramic Matrix Fibre Composites, in Handbook on Continuous Fiber-Reinforced Ceramic Matrix Composites, R. L. Lehman, S. K. El-Rahaiby and J. B. Wachtman eds., Purdue University Press, West Lafayette, USA (1995) 527-545. 

Most borides actually form a mixed bor-ia-metal oxide scale and will be discussed in Section 7.7.1.1. However, boron nitride (BN) and boron carbide (B4C) form a pure boria scale. BN has been used for many years as a crucible material in vacuum and is of recent interest as a fiber coating for continuous fiber reinforced ceramic matrix composites. The most common form of BN is a hexagonal, graphite-like structure. This discussion will be confined to oxidation of hexagonal BN. In pure oxygen BN oxidizes as ... 

Holmes, J. W., and Wu, X., "Elevated temperature creep behavior of continuous fiber-reinforced ceramics." High Temperature Mechanical Behavior of Ceramic Composites, ed. Near, SVandJakus, A(1995) 193-259. 

Zok, F. W Evans, A. G Mackin, T. J. (1995). Theory of fiber reinforcement. In Lehman, R. L., El-Rahaiby, S. K., Wacht-man, J. B. Jr., (Eds.),Handbookon Continuous Fiber-Reinforced Ceramic Matrix Composites (pp. 35-110). WeterviUe, OH Purdue University, West Lafeyette and The American Ceramic Society. 

Continuous fiber reinforcement, 5 555, 654 performance in ceramic—matrix composites, 5 576-577 Continuous fibers, 11 177... 

Fiber-Matrix Composites. As shown in Figure 1.75, there are two main classifications of FMCs those with continuous fiber reinforcement and those with discontinuous fiber reinforcement. Continuous-flber-reinforced composites are made from fiber rovings (bundles of twisted filaments) that have been woven into two-dimensional sheets resembling a cloth fabric. These sheets can be cut and formed to a desired shape, or preform, that is then incorporated into a composite matrix, typically a thermosetting resin such as epoxy. Metallic, ceramic, and polymeric fibers of specific compositions can all be produced in continuous fashions, and the properties of the... 

In the presentation of the elevated temperature mechanical behavior of ceramic matrix composites, some degree of separation has also been made between fiber-reinforced and whisker- or particulate-reinforced composites. This has been necessary because of the way the field has evolved. The continuous fiber-reinforced composites area in many ways has evolved as a field in its own right, driven by developments in fiber processing technology. 

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