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Al2009 matrix composites reinforced with highly dispersive carbon nanotubes (CNTs) were prepared by cryogenic milling combined with powder metallurgy, the structure evolution of CNTs during preparation and the mechanical properties of composites were investigated. The results show that short CNTs with uniform distribution were obtained in aluminum powders through cryomilling. Most CNTs retained tubular...
15% vol. SiCp/2009 composites prepared by powder metallurgy were quenched in room temperature water and 20% polyethylene glycol (PEG) solution respectively, then aged naturally. The influence of quenching agent on microstructure, properties and thermal stress of SiCp/2009 composites were investigated by means of scanning/transmission electron microscope, hardness and tensile test. The results showed...
A carbon fiber hexapod was used to install an optical telescope on the payload instrument module of a satellite. In order to reduce distortion stresses, titanium alloy brackets with flexure sections were employed to connect the end fittings of the carbon fiber struts. The design, fabrication and assembling of the carbon fiber hexapod were discussed. The developed hexapod passed the qualified level...
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