ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract SiC was partially infiltrated into three types of carbonized paper-fibre preforms using pressure-pulsed chemical vapour infiltration from SiCl4(4%)–CH4(4%)–H2 at 1100 °C (A-type preforms, source fibres of filter paper; BH- and BL-type preforms, source fibres of recycled paper). The porosity of the preforms decreased linearly with the number of pulses. After 10 000 pulses, the porosity of A-, BH- and BL-type samples was 77,78 and 85%, respectively. Average pore sizes of A-, BH- and BL-type samples after 10 000 pulses were about 5.0, 2.7 and 7.0 μm, respectively. On an A-type sample of 10 mm Φ and 5 mm long after 10 000 pulses, pressure drop along the direction of axial air flow was 10 kPa at a face velocity of 0.8 m s−1. The order of pressure drop was BH,〉, A 〉, BL. Flexural strength of A-type sample reached 10 MPa after 15,000 pulses.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004448424084
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