Before microdevices can be developed into medical implants and other microscopic products, developers must first understand how friction, wear, and other forces operate on such a small scale. Bharat Bhushan, a professor of mechanical engineering at Ohio State University, is using an atomic force microscope to answer questions about wear and friction on such a small scale. Atomic force microscopes record the shapes of objects by dragging a tiny needle with a radius less than 100 nm across the surface of an object. Bhushan used the microscope on the surface of a micromotor's rotor and surrounding casing. He detected bumps between 11 and 100 nm that resulted from chemical process used to make the micromotor work for a biomedical application, and determined that the bumps on the rotor caused friction when they rubbed against the casing. When Bhushan tried lubricating the motor with a synthetic lubricant, the lubricant gummed up the tiny motor. But when they baked the motor and lubricant combination at 150C, the lubricant became a smooth layer hat allowed free movement.
Design collaboration now includes the entire value chain. From suppliers to customers, purchasing to outside experts, the collaborative design team includes internal and external groups. The design process now stretches across the globe in multiple software formats.
A new high-pressure injection-molding technology produces near-net shape parts with 2-inch-thick walls from high-performance materials like PEEK, PAI, and carbon-filled polymers. Parts show no voids, sinks, or porosity, have more consistent mechanical properties, and are stronger.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.