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1195787902銀蟲 (初入文壇)
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[求助]
Al~Ll2O3復(fù)合粉體的生產(chǎn)參數(shù)對(duì)其微觀結(jié)構(gòu)和表面抗壓能力的影響
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Materials and experimental procedures In this investigation, aluminum powder with purity of 99.97% and the average particle size of 30 lm and three types of alumina powder with average particle size in the range of 3-48 lm were used in the range of 0-20 wt.%. The densities of aluminum and alumina powders were 2.7 and 3.97 g/cm3,respectively. Chemical composition of alumina powder is given in Table 1. Electron micrographs of the powders are presented in Fig. 1. Powders were weighted and then mixed in a planetary ball mill for 1 h under a rotation speed of 150 rpm. For this purpose, four balls made of WC-Co with a weight of 80 g each were used. Ball to powder ratio was 10:1 and liquid ethanol was used as a pro-cess control agent. The powders were dried at 100 C before compaction. |
金蟲 (著名寫手)
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實(shí)驗(yàn)材料與方法 試驗(yàn)中,采用了0-20%質(zhì)量分?jǐn)?shù)的99.97%純度,平均粒徑30lm的鋁粉以及三種粒徑范圍為3-48lm的氧化鋁粉粒。鋁和氧化鋁粉粒的密度分別為2.7,3.97克/毫升。氧化鋁粉粒的化學(xué)組成見表1.電鏡微觀結(jié)構(gòu)見圖1。將稱重后的粉粒以150轉(zhuǎn)/分的轉(zhuǎn)速混合于球體磨一小時(shí)。為達(dá)到更好的效果,分別選用了四種各80克的WC-Co球 。球微粒/粉粒 比為10:1,以乙醇(液態(tài))為反應(yīng)控制劑。所得到的粉粒先100 C干燥再進(jìn)行壓制。(感覺ball和powder沒翻譯好) 多多交流,共同進(jìn)步 祝順利,忘有用 |
金蟲 (著名寫手)
金蟲 (著名寫手)
金蟲 (著名寫手)
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ball mill 是球磨機(jī), ball 就是球磨時(shí)所用的鋼球。 powder 就是標(biāo)題中的粉體。 第一句翻的有點(diǎn)長(zhǎng)。 大意應(yīng)該是用一種鋁粉分別與三種不同粒徑的氧化鋁混合制成復(fù)合粉體。 質(zhì)量比到底是鋁粉的還是氧化鋁的還要到原文確認(rèn)一下。 |
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