This report summarizes the activities that were conducted as part of the AFOSR Workshop on Aerospace Materials for Extreme Environments that was held August 3-5, 2009 in Clayton (St. Louis), MO. The workshop brought together -80 participants from universities, government laboratories, and companies from around the world. The agenda included 28 invited presentations and 23 additional posters on the current status and latest research results related to the fundamental science ...
Friction and wear of engineering components are critical factors influencing the product life. In this study a wear simulation method is presented to investigate the wear behavior of a C/C composite multidisk clutch under simulated operation conditions. A modified Archard's wear model is implemented into a user subroutine which works in association with an axisymmetric finite element model to predict the progress of wear on friction surfaces. An element removal ...
Fabricating ceramic materials into complex 3-D components is typically a complicated, costly, and time-consuming process that involves diamond machining to achieve its final shape. In most cases, the initial processing is powder-based, followed by densification (sintering) at elevated temperatures. Only a few circumstances, such as fuse casting and thermal spraying, can ceramics be directly fabricated into near net-shape, fully dense ceramic components. However, these techniques require an extremely high temperature ...
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