Abstract: The oxidation behaviours of the C/C composites for Boeing 757 and Boeing 767 airplane brake disc were investigated.The relationship between the oxidation mass loss of the composite for B757 brake disc and test temperature is three-stage, and that for B767 brake disc is two-stage.The remarkable oxidation temperatures of the C/C composite for B757, B767 brake disc are 600℃, 700℃ resp ectively. The oxidation dynamic curve above the temperature is linear, the curve below the temperature is exponential. After the composite is oxidized deeply,the texture of carbon fibre can be observed clearly.The oxidation first occurs at the interface between carbon fibre and carbon matrix;the carbon matrix is oxidized more deeply than the carbon fibre,and carbon fibre is oxidized to become of a nedle-tip-like form. The oxidation finally makes the brake comp ositebereduced to fibre framework in the oxidized surface layer;but the fibre in carbon felt of the B757 brake composite is oxidized to become of a pipe-like form.
Oxidation behaviour of C/C composite for airplane brake disc
Abstract:
The oxidation behaviours of the C/C composites for Boeing 757 and Boeing 767 airplane brake disc were investigated. The relationship between the oxidation mass loss of the composite for B757 brake disc and test temperature is three stage, and that for B767 brake disc is two stage. The remarkable oxidation temperatures of the C/C composite for B757, B767 brake disc are 600?℃, 700?℃ respectively. The oxidation dynamic curve above the temperature is linear, the curve below the temperature is exponential. After the composite is oxidized deeply, the texture of carbon fibre can be observed clearly. The oxidation first occurs at the interface between carbon fibre and carbon matrix; the carbon matrix is oxidized more deeply than the carbon fibre, and carbon fibre is oxidized to become of a nedle tip like form. The oxidation finally makes the brake composite be reduced to fibre framework in the oxidized surface layer; but the fibre in carbon felt of the B757 brake composite is oxidized to become of a pipe like form.