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  2. Ceramic knife - Wikipedia

    en.wikipedia.org/wiki/Ceramic_knife

    Ceramic knives are substantially harder than steel knives, will not corrode in harsh environments, [2] are non-magnetic, and do not conduct electricity at room temperature. Because of their resistance to strong acid and caustic substances, [ 3 ] and their ability to retain a cutting edge longer than steel knives, [ 2 ] ceramic knives are ...

  3. List of blade materials - Wikipedia

    en.wikipedia.org/wiki/List_of_blade_materials

    A variety of blade materials can be used to make the blade of a knife or other simple edged hand tool or weapon, such as a sickle, hatchet, or sword. The most common blade materials are carbon steel, stainless steel, tool steel, and alloy steel. Less common materials in blades include cobalt and titanium alloys, ceramic, obsidian, and plastic.

  4. Blade - Wikipedia

    en.wikipedia.org/wiki/Blade

    Blade. A blade is the sharp, cutting portion of a tool, weapon, or machine, specifically designed to puncture, chop, slice, or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are intended to cut. This includes early examples made from flaked stones like flint or obsidian, evolving through ...

  5. Kitchen knife - Wikipedia

    en.wikipedia.org/wiki/Kitchen_knife

    A variety of kitchen knives [clarification needed]. A kitchen knife is any knife that is intended to be used in food preparation.While much of this work can be accomplished with a few general-purpose knives – notably a large chef's knife, a tough cleaver, a small paring knife and some sort of serrated blade (such as a bread knife or serrated utility knife) – there are also many specialized ...

  6. Rockwell scale - Wikipedia

    en.wikipedia.org/wiki/Rockwell_scale

    Rockwell scale. The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1] There are different scales, denoted by a single letter, that use different loads or ...

  7. Knife - Wikipedia

    en.wikipedia.org/wiki/Knife

    A knife (pl.: knives; from Old Norse knifr 'knife, dirk' [1]) is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago , as evidenced by the Oldowan tools.

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