“powder metallurgy”的概念、定义、习题解题方法及翻译-物理辞典

单词	powder metallurgy
释义	powder metallurgy A process in which powdered metals or alloys are pressed into a variety of shapes at high temperatures. The process started with the pressing of powdered tungsten into incandescent lamp filaments in the first decade of this century and is now widely used for making self-lubricating bearings and cemented tungsten carbide cutting tools. The powders are produced by atomization of molten metals, chemical decomposition of a compound of the metal, or crushing and grinding of the metal or alloy. The parts are pressed into moulds at pressures ranging from 140 × 10⁶ Pa to 830 × 10⁶ Pa after which they are heated in a controlled atmosphere to bond the particles together (see sintering)
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。