| 单词 | powder metallurgy |
| 释义 | > as lemmaspowder metallurgy powder metallurgy n. the branch of metallurgy which is concerned with the production of metals as fine powders and their subsequent pressing and sintering into compact forms. ΘΚΠ society > occupation and work > industry > working with specific materials > working with metal > [noun] > branches of metallurgy pyrotechny1592 metallostatics1665 siderurgy1869 metallography1871 physical metallurgy1905 pyrometallurgy1909 powder metallurgy1933 1933 Engin. & Mining Jrnl. 134 373/1 What is frequently referred to as ‘powder metallurgy’ had its beginnings at the turn of the century when the metals tungsten and molybdenum first became commercial commodities. 1959 Listener 12 Mar. 453/1 Coolidge in America developed the process now known as powder metallurgy, by which a bar of compressed tungsten powder was sintered at a temperature below the melting point of the metal. 1993 R. J. Pond Introd. Engin. Technol. (ed. 2) x. 296 Powder metallurgy..is a manufacturing technique involving the compaction of powdered metal. 2002 Times (Nexis) 4 Nov. (Business section) 5 Powder metallurgy is a way of producing complex, high-performance parts in one pressing. < as lemmas |
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