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    - ( , ). http://en.wikipedia.org/wiki/Hard_disk_platter
    The material of the main magnetic medium layer is usually a cobalt-based alloy.
    , - .
    Last edited by enkov; 4th October 2010 at 16:18.
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    Adun Toridas! ethernall's Avatar
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    Anywhere from one to seven recordable platters are contained within a modern Hard Disk Drive's metallic enclosure. Hard Disk Drive platters are perfectly circular disks made from either an aluminium alloy or a more recently a glass ceramic substrate which is a ceramic disk suspended in a glass outer shell. Onto the surfaces of a disk's platter is laid a thin layer of a magnetically sensitive coating called the recording medium, in modern drives the mixture is a complex amalgam of different materials such as cobalt chromium platinum boron (CoCrPtB) and other such rare metals.
    ...
    the predominant technique involves the laminating of magnetic and non-magnetically charged metals such as chromium, cobalt, platinum and alloys of similar


    :

    Precautions
    Main article: Cobalt poisoning

    Cobalt is an essential element for life in minute amounts. The LD50 values soluble cobalt salts has been estimated to be between 150 and 500 mg/kg. Thus, for a 100 kg person the LD50 would be about 20 grams.[46]

    After nickel and chromium, cobalt is a major cause of contact dermatitis and is considered carcinogenic.[47] In 1966, the addition of cobalt compounds to stabilize beer foam in Canada led to cardiomyopathy, which came to be known as beer drinker's cardiomyopathy.[48]
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    Quote Originally Posted by CuMo View Post
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    Last edited by enkov; 5th October 2010 at 00:00.
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    Quote Originally Posted by ClickMe View Post
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