Thermal desorption of gases from aluminum alloy Al 6061, their rates and activation energies
Thermal desorption of gases from aluminum alloy Al 6061, their rates and activation energies
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铝合金 Al 6061 中气体的热解吸、速率和活化能
DOI：
10.1116/1.568944
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
J. Herrera
中科院分区：
文献类型：
--
作者：
H. Halama;J. Herrera
在交叉质子储存环的真空室的构造中使用Al与使用不锈钢相比具有若干优点。因此，我们已经对由铝合金6061制成的长管进行了特高压研究，以了解这种材料是否可以用于布鲁克海文的质子交叉存储加速器设施ISABELLE。出气率，测量两种不同的方法，比较了几种表面处理和三个烘烤温度。Ar和O2放电清洗获得的最低放气速率小于1×10 - 14 Torr l s-1cm-2。管道中的残余气体含有超过99%的H2，并含有痕量的CO和CO2。通过观察这些气体的脱附随温度的变化，我们测定了H_2的扩散热（EH_2 =10.5±1.0千卡/摩尔）和CO（ECO=29±2千卡/摩尔）和CO_2（ECO_2 =25±2千卡/摩尔）的热活化能。在280°-300 °C具有峰值解吸的Ar似乎也嵌入金属中。因为...
The use of Al in the construction of the vacuum chamber of intersecting proton storage rings has several advantages over the use of stainless steel. We have, therefore, undertaken UHV studies on long pipes made of Al alloy 6061 to see whether this material could be used in the proposed proton intersecting storage accelerator facility ISABELLE at Brookhaven. The outgassing rates, measured by two different methods, are compared for several surface treatments and three bakeout temperatures. The lowest outgassing rate of less than 1×10−14 Torr l s−1cm−2 was obtained with Ar and O2 discharge cleaning. The residual gas in the pipe contained more than 99% H2 with traces of CO and CO2. By observing the temperature dependence of the desorption of these gases, we have measured the heat of diffusion of H2 (EH2=10.5±1.0 kcal/mole) and the thermal activation energies of CO (ECO=29±2 kcal/mole) and CO2 (ECO2=25±2 kcal/mole). Ar, with a peak desorption at 280°–300 °C, also appears to be embedded in the metal. Since all ...