An accelerated durability test method for contact start and stop operations on coated magnetic disks.

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  • 塗布型磁気ディスクのコンタクト・スタート・ストップ寿命の一加速評価法
  • トフガタ ジキ ディスク ノ コンタクト スタート ストップ ジュミョウ ノ

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Abstract

Pin-on-disk sliding test was investigated as an accelerated durability test for contact start and stop (CS/S) operations on coated magnetic recording disks. Disk lifetime and sliding characteristics of sliding test were compared with those of CS/S test. Sapphire was selected for slider material to reduce slider wear. The results are summarized as follows. (1) A good correlation is found in disk lifetime of both tests. (2) Friction force between slider and disk gradually increases at the beginning of the test, satulates at a level in the middle and increases suddenly at the end. This pattern is very similar to that of peak friction force at each contact start during CS/S test. (3) The observation through transparent sapphire slider shows that wear particle intrusion to contact point triggers the appearance of wear scar on test disk surfaces. This is also very similar to the Head Crash process during CS/S test. (4) From above results, sapphire pin sliding test considered here could be used as an accelerated durability test for CS/S operations.

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