| 摘要 |
<p>A filler material, having a light weight, an increased mechanical strength, and various excellent characteristics such as damping ability, as well as a composite material and a structural material thereof are provided. The filler material comprises mats made of alumina fibers, and layers of hollow silica-alumina-microspheres which are dispersed on and affixed to the associated mat, with the mat and the layers alternately stacked with each other. The composite material comprises a matrix of aluminum in which the above-mentioned filler material is filled. The structural material, which contains therein a predetermined amount of microspheres enough to provide the material with a desired vibration amplitudefrequency characteristic, is applied to a head arm for supporting a magnetic head of a disk device, for instance.</p> |
