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qingfeng7998鐵桿木蟲(chóng) (著名寫(xiě)手)
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[求助]
求助漢語(yǔ)翻譯為英語(yǔ)的一段話(材料類專業(yè))
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| 但在此基礎(chǔ)上繼續(xù)增加燒結(jié)助劑的用量,復(fù)相陶瓷材料的相對(duì)密度反而出現(xiàn)下降的趨勢(shì)。當(dāng)燒結(jié)助劑的添加量達(dá)到Al%和B%時(shí),復(fù)相陶瓷材料的相對(duì)密度分別下降到C%和D%。這是由于液相對(duì)燒結(jié)的影響主要集中在燒結(jié)時(shí)的中前期,它能起到加速燒結(jié)的作用,但是在燒結(jié)后期(特別是密度大于E%以后),復(fù)相陶瓷材料的致密化主要是靠晶界的體積擴(kuò)散來(lái)完成的,此時(shí)液相對(duì)材料的致密化影響不大,過(guò)多的液相反而加速晶粒的長(zhǎng)大,從而影響復(fù)相陶瓷材料的性能。 |
版主 (文壇精英)
米米
| However, when the amount of sintering aids increased based on this, the relative density of multiphase ceramic materials decreased. When the adding amount of sintering aids reached A% and B%, the relative density of multiphase ceramic materials decreased to C% and D% respectively. This is because the effect on sintering by liquid phase were focused on early-middle period and precipitated the sintering process; in late period of sintering (especially when density is larger than E%), the densification of materials was mainly completed by distribution of grain boundary volume and liquid phase had little effect on densification of materials. The excess liquid phase could increase the growth of grains and therefore affected the functions of multiphase ceramic materials. |
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