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Achieving the increasing requirements for greater tracks per inch (TPI) in hard disk drives will ultimately dictate changes in design and materials in the face of higher rotational speeds. This work describes the use of Aluminum-Boron Carbide in actuator applications and compares dynamic performance with that of stainless steel in an identical configuration. The data indicate that the inherent material increases in (E/ρ) lead to higher frequencies at which resonance is observed, and suggests the availability of a more stable structural material with which to manipulate the head/suspension assembly during drive operation. Material properties of E‾282 GPa, v‾0.2, and ρ‾2.62 are readily achievable for realistic geometries suitable for actuator applications.

ADVANCED MATERIALS FOR HIGH PERFORMANCE DISK DRIVES: THE USE OF Al-B-C FOR ACTUATORS