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問：Apiezon真空潤滑脂是否抗輻射(she)？

答：Apiezon L 和 M真空潤滑(hua)脂表現出(chu)一(yi)定(ding)程度的耐輻射(she)性，在用 4 MeV 電(dian)子照(zhao)射(she)至約 1 MGy 水平(ping)后，剛度僅相(xiang)對較小(xiao)地增(zeng)(zeng)加。在此暴露之(zhi)后，潤滑(hua)脂的潤滑(hua)性能仍(reng)然令人滿意，并且在更高水平(ping)的輻照(zhao)下也是如此，盡管剛度增(zeng)(zeng)加得(de)更快。

在高(gao)水(shui)平的(de)照(zhao)射下，會產(chan)生少量氣(qi)體（主要是(shi)甲烷和(he)乙(yi)烯），從而使潤(run)滑脂(zhi)失去其極(ji)低蒸(zheng)氣(qi)壓的(de)特性。盡管如此，與其他高(gao)真空潤(run)滑劑（例(li)如硅(gui)樹脂(zhi)、酯(zhi)類(lei)和(he)鹵(lu)化產(chan)品）相比，Apiezon 潤(run)滑脂(zhi) L 和(he) M 在高(gao)輻照(zhao)水(shui)平下是(shi)明顯(xian)更好的(de)潤(run)滑劑。

Q: Are Apiezon greases resistant to radiation?

A: Apiezon L and M greases show a degree of radiation resistance with only a comparatively small increase in stiffness after irradiation with 4 MeV electrons to a level of about 1 MGy. After this exposure the lubrication properties of the grease are still satisfactory and this is true at even higher levels of irradiation, although the stiffness increases more rapidly.

At high levels of irradiation small quantities of gases, (mainly methane and ethylene) are evolved so that the grease loses its very low vapour pressure characteristics. Nevertheless Apiezon greases L and M are markedly better lubricants at high irradiation levels than other high vacuum lubricants such as silicones, esters and halogenated products.

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