Abubuwan daban-daban na sandunan busa sun dogara da sandunan bugun kanta, waɗanda za a iya yin su da ƙarfe na manganese, ƙarfe na ƙarfe na martensitic (ƙarfe na martensitic), ƙarfe na chrome, ko abubuwan haɗin matrix na ƙarfe (MMC, kamar yumbu).MMCs sun ƙunshi nau'ikan ƙarfe iri-iri da nau'ikan cera na musamman ...
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