| 释义 |
Carborundum orig. U.S.|kɑːbəˈrʌndəm|
Also carborundum.
[Trade-name, f. carbon n. + corundum.]
A compound of carbon and silicon, SiC, a very hard crystalline substance, used either as a powder or in blocks for polishing and scouring, for grinding tools and as a refractory lining in furnaces. Also attrib.
1892Official Gaz. U.S. Patents LIX. 1914/1 [Trade-mark registered by] The Carborundum Company, Monongahela City, Pa. Ibid., Trade-marks registered June 21, 1892 [include] Carborundum. 1893Amer. Jrnl. Sci. XLVI. 472 While examining the hardness of ‘carborundum’, a carbide of silicon, made by Mr. Acheson of Pittsburg, it was found that it readily scratched red, blue, white, pink, and yellow corundum in the form of fine gems. 1895Bloxam's Chem. (ed. 8) 127 Silicon carbide (carborundum)..is prepared by heating silicon or silica with carbon in the electric furnace. 1917Mod. Boot & Shoe Maker III. 250 The rough scouring on the coarse sandpaper roll or the felt roller covered with carborundum. 1924Chambers's Jrnl. 39/1 The cutting edge is bestowed by grinding on a carborundum wheel. 1963J. Osborne Dental Mechanics (ed. 5) xv. 343 The sprues must next be removed with either a diamond disc or a carborundum-type ‘cut-off’ disc. |