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Most metal borides are hard; [41] however, a few stand out among them for their particularly high hardnesses (for example, WB 4, [42] [43] RuB 2, OsB 2 and ReB 2). These metal borides are still metals and not semiconductors or insulators (as indicated by their high electronic density of states at the Fermi Level ); however, the additional ...
4Cr14MoV, EN 1.4117 / DIN X38CrMoV15, good enough to make kitchen knives. 5Cr15MoV, some knives manufacturers define as 5Cr13MoV, the hardness could be 55–57 HRC. It's widely used to make kitchen knives, high-end scissors, folding knives, hunting knives, etc. It is equivalent to 1.4116 and German 4116 steel in composition.
This is a list of named alloys grouped alphabetically by the metal with the highest percentage. Within these headings, the alloys are also grouped alphabetically. Within these headings, the alloys are also grouped alphabetically.
[28] [27] In 1958, it was not only the most expensive building of its time — $36 million — but it was the first building in the world with floor-to-ceiling glass walls. [27] Mies van der Rohe achieved the crisp edges that were custom-made with specific detailing by General Bronze [ 28 ] and "even the screws that hold in the fixed glass ...
An amorphous metal (also known as metallic glass, glassy metal, or shiny metal) is a solid metallic material, usually an alloy, with disordered atomic-scale structure. Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms. Amorphous metals are non-crystalline, and have a glass-like structure.
Diamond was the hardest known naturally occurring mineral when the scale was designed, and defines the top of the scale, arbitrarily set at 10. The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch, or the softest material that can scratch the given material.
The metals of antiquity are the seven metals which humans had identified and found use for in prehistoric times in Africa, Europe and throughout Asia: [1] gold, silver, copper, tin, lead, iron, and mercury. Zinc, arsenic, and antimony were also known during antiquity, but they were not recognised as distinct metals until later.