| 摘要 |
A highly thermally conductive spindle support shaft is composed of a metal matrix composite of aluminum (Al) and silicon carbide (SiC) of substantially 53% to 63% silicon carbide by volume. The spindle support shaft supports a magnetic disk file spindle by means of rotatable bearings, replacing a steel shaft. The spindle support shaft increases the heat transfer from, and reduces the temperature of, the rotatable bearing, and matches the coefficient of thermal expansion of a conventional steel shaft, thereby maintaining the bearing preload through a range of temperatures.
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