Short carbon fiber reinforced SiC (Csf/SiC) composite was prepared by hotpressing method. XRD, SEM and isothermal oxidation test were used to study the isothermal oxidation property of Csf/SiC composite. The results show that the oxidation weight loss of the composite is the most at 900℃. The weight loss decreases with the oxidation temperatures rising. Below 900℃, the oxidation weight loss of the composites is caused by the carbon fibers oxidation. Above 1450℃, the composites gain weight. Between 900-1450℃, short carbon fibers on the composite surface are oxidized and the SiC matrix forms a protecting film. The inner short carbon fibers still have the strengthen effect for the oxidation layer and matrix protecting them from oxidation, and the composites have good self-resistance oxidation property. When the composites oxide at 1600℃, the composite surface is destroyed badly and lose the resistance oxidation capacity.
ANG Han-Ling
,
ZENG Xie-Rong
,
XIONG Xin-Bo
,
LI Long
,
ZOU Ji-Zhao
. Research of Oxidation Resistance of Short Carbon Fiber Reinforced SiC Composite by Hotpressing[J]. Journal of Inorganic Materials, 2009
, 24(2)
: 305
-309
.
DOI: 10.3724/SP.J.1077.2009.00305
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