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N P Bansal, J.A. Setlock/Composites: Part A 32(2001)1021-1029 Fiber spool Cut tap Take-up drum Hot press Binder burnout Stack tapes arm bres Fig. 1 Schematic of the set-up used for fabrication of small diameter, multifilament fiber tow reinforced ceramic composites by matrix slurry infiltration and hot pressing of the resulting FRCs were characterized and room tempera- were BacO,(Alfa Products), SrCO3(Alfa Products), AlO3 ture mechanical properties were measured. Strong, tough, (Baikowski International Corp, high purity CR 30), and nd almost fully dense composites reinforced with BN/SiC- SiOz( Cerac Inc,99.9% purity,-325 mesh) powders coated. Hi-Nicalon fibers have been obtained Appropriate quantities of various powders were slurry mixed in acetone and ball milled for -24 h using alumina milling media. Acetone was then evaporated and a part of 2. Materials and experimental procedure the mixture was subjected to thermogravimetric analysis (TGA)in air. The oxide mixed powder was calcined at The matrix of BSAs composition was synthesized by -900-920C for decomposition of the carbonates into olid-state reaction method [13]. The starting materials used oxides, followed by cooling to room temperature and Fig. 2. TGA curve of 0.75BaCO3-0 25SrCO3-Al2O3-2SiO2 mixed powder at a heating rate of 5.C/min in & J' ! 0 ! & & # ! % ' $ ( ! # 0 # B5/C ( & ! ',/ > ? ',/ > ? .,/ > ! " ' & # 'J /)? ,. >' " 6662 # /.+ ? ! K ! ! # .1 & & ! ! F & # >(:? ( ! ! 6))-6.)' ! # & 5).. / 0 1 2 . / 3 43** 5 *3 6 *3! & 5 ! # # & & . (: )*+',/-).+ ',/-.,/-. ,. ! & +'%