A.A. Kolchin et al. /Composites Science and Technology 61(2001)1079-1082 can be expected owing to the presence of a relatively low [2] Marshall DB. Davis JB, Morgan PED, Waldrop JR, Porter JR. interface strength and low fibre strength when measured Properties of La-monozite as an interface in oxide composites. Z on long fibre lengths Metallkd1999902:1048-52. Secondly, the fracture toughness of the composites is 3 Levi CG. Zok Fw, Yang J-Y, Mattoni M. Lofvander JPA Microstructural design of stable porous matrices for all-oxide clearly higher than that of the matrix, certainly as a ceramic composites. Z Metallkd 1999: 90(12): 1037-47 esult of the processes occurring at the weak fibre/ Deleglise F, Berger MH, Bunsell AR. In: Crivelli Visconti I, edi- matrix interface; in particular, fibre pull-out can be seen tor. Proc. of 8th European Conf. Compos. Mater. Napoli, June on the failure surface of the composite, Fig. 6, although 98. Cambridge: Woodhead, 1998, Vol 4, p. 175 ne length of pull-out is not large 5 Mileiko ST, Kazmin VI Structure and mechanical properties of oxide fibre reinforced metal matrix composites produced by the It is clear that achieving sufficiently high energy dis- sipation at the interface and, hence, high fracture toughness of the brittle-fibre/brittle-matrix composites [6 Mileiko ST, Kiiko VM, Sarkissyan NS, Starostin MYu, Gvo requires careful adjustment of properties of all the con- deva SI, Kolchin AA, Strukova GK. Microstructure and prop- tituents, which has not been the objective of the present Al2Or-AlsY3012 fibre produced via internal piece of work. The aim has been to demonstrate a major rystallization route. Comp Sci Tech 1999: 59(11): 1763-72. [7 Kurlov VN, Kiiko VM, Kolchin AA, Mileiko ST Sapphire fibres possibility of using ICM oxide fibres in oxide/oxide grown by a modified internal crystallization method. J Cryst composites, and this objective has been achieved Growth1999204(4):499-504 [8 Mileiko ST, Kiiko VM, Starostin M.Yu, Kolchin AA, Kozhev nikoy ls. fabrication and mullite fibers. Scripta Materialia, submitted Acknowledgements [9 Mileiko ST. Oxide fibres produced by internal crystallization method and their usage in composite technology, CD-ROM The work was supported by INTAs and RFBR ( Project #95-599). The authors are thankful to Dr M. Yu. Starostin and Mr. A.Ya. Mizkevich. for their [10] Mileiko ST, Kiko VM, Kolchin AA, Serebryakov AV, Korzhor VP. Starostin MYu, Sarkissyan NS. High temperature strength help in the experimental work and creep properties of oxide-fibre/ni-based matrix composites, [l Kumar Ks, Bao G. Intermetallic-matrix composites: an over- References iew. Comp Sci Tech 1994: 52(2): 127-50 [12] Kovchik SE, Morozov EM. Characteristics of short time fracture Cinibulk MK. Magnetoplumbite compounds as a fiber coating in toughness of materials and methods of their evaluation. Kiev oxide/oxide composites Ceram Eng Sci Proc 1994: 15:721-8. Naukova Dumka, 1988(in Russian)     ,    -  #  - ,    ,    ,  ,   - , -      ,   -       -   ,      -(    .      - - -    4, * ,  , - .   , @    #, N , , .     -   , - , -  ..    / - O  -   -   .       O# -    -          O  - , @3         O#   #
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