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In this paper, the corrosion of materials in carbonaceous atmospheres at high temperatures is reviewed, including metal dusting and internal carburization.

本文综述了材料在高温含碳气氛中的腐蚀,包括金属粉化和碳化,讨论了材料在含碳气氛中的腐蚀机理和腐蚀动力学。

This article discusses the mechanism and factors of concrete carbonation of the reinforced concrete structures, and sums up a few models of concrete carbonation depth.

文中讨论了钢筋混凝土结构的混凝土碳化机理及碳化速度的影响因素,总结了混凝土碳化深度的多种计算模型。

Based on the result, the coalification mechanism of

尤其是芳碳率、质子化碳、芳氢率、桥头碳、氧接芳碳、侧支芳碳和脂碳率及芳甲基、脂甲基等,随碳元素的含量、O/C值变化的演化

A series of molybdenum carbide catalysts were prepared using 20%CH4-H2 to carburize molybdenum trioxide at different temperatures. The catalysts were characterized using X-ray diffraction, X-ray photoelectron spectroscopy and N2-adsorption. Their catalytic performance was evaluated in the model reaction of the dry-methane reforming to synthesis gas. Here, the characteration of bulk and surface Mo2C catalysts and its influence on the catalytic performance were described.

以MoO3为前驱物,于20%CH4-80%H2的混合气体(100 mL/min)中,在不同设定终温下进行碳化,制备了一系列不同碳化终温的Mo2C,通过XRD和XPS等手段进行了表征,并对其甲烷二氧化碳重整制备合成气的催化性能进行评价,讨论了碳化终温作为Mo2C的制备参数,与所制备的Mo2C体相、表面特征和催化剂性能的关系。

Compared to prior art, the method effectively resolves disadvantage that polymer, which is generated by tetracarbon octafluoride, on side wall of the welding pad is more and not easy to be cleaned, reduces polymer generation on side wall of the welding pad by reducing concentration of the tetracarbon octafluoride and correspondingly adding carbon tetrafluoride.

与现有技术相比,本发明有效解决了由于八氟化四碳产生的聚合物较多而造成焊垫侧壁的聚合物不易被清洗的缺点,在不影响刻蚀效果的前提下适量降低八氟化四碳的浓度,而对应加入四氟化碳,有效减少在焊垫侧壁生成的聚合物,该聚合物更容易在后续清洗制程中清洗干净。

"Carburize:To treat, combine, or impregnate with carbon, as when casehardening steel ."

使渗碳,碳化:使与碳一起处理,使与碳混合或使充满碳,如将钢的表面粹火硬化。

For TRO there are a little surfacatants whose effect are not good.In this paper,content of sulfonates and composition of alkyl are decided through right design ;under control reaction conditions different alkylbenzene sulfonates are synthesized;Polyreaction catalyst is developed .non-straight high carbon olefine are made through C9-C12 Polyreaction technolgy;clear composition alkylkenzene is sulfanated in falling-film reactor by SO,product can be adjusted,recipe of the surfacate can be used for super-low interfacialtension with Daqing oil -10-3-10-4mN/m,and stablity is good too.According to method issued by Daqing Develop and Explore Research institute,EOR is over 20% in natural core .

本文研究通过烷基苯磺酸盐组成的正确设计,确定了磺酸盐的当量范围和烷基碳数组成和分布;通过对烷基化条件控制,设计合成了不同碳数的直链和支链烷基苯及烷基二甲苯,并用于制备了相应的烷基苯磺酸盐;研制出了新型的烯烃叠合络合催化剂,采用C_9、C_(12)支链烯烃叠合工艺合成了更高碳数的支链烯烃,并进一步合成出相应的烷基苯和烷基二甲苯;以SO_3为磺化剂,通过对磺化条件的选择和控制,采用已知组成的烷基苯混合物进行膜式磺化反应,使合成工艺得以简化;所得磺酸盐组成确定并且可控,最终配方可与大庆原油形成超低界面张力,达10~3~10~(-4)mN/m数量级,且稳定性良好;以合成的烷基苯磺酸盐为主体形成了三元复合驱配方,室内驱油模拟实验表明,按照大庆研究院对复合驱体系活性剂的评价方法,在天然岩芯上的驱油效率在20%以上。

The effects of the spray-drying process of the ammonium paratungstate and the carburization temperature on the formation of the precusor and WC powder were investigated.

采用喷雾干燥-固定床法制备碳化钨粉末,研究了喷雾干燥和碳化反应温度对制备偏钨酸铵前驱体以及碳化钨的影响,前驱体粉末呈现均匀的球状形态,平均粒径为10~20μm,喷雾温度对影响粒径大小和分布影响小;400℃的进口温度下进行喷雾干燥,喷雾粉末仍然保持偏钨酸铵原来的基本组成不发生分解。

B〓C coating possessed 4% of porosity, 12. 8Gpa of bonding strength, 28Gpa of microhardness, and its modulus is up to 230Gpa. It would provide a kind of coating material with excellent properties for many industrial fields.(2) The phase composition of B〓C coating was studied by XPS, XRD and EDS. It was found that: the oxidation activity energy of B〓C powder and coating is different, which is due to the difference of phase composition between them.

用XPS、XRD和EDX研究了碳化硼涂层的相组成,发现碳化硼粉末在涂层形成过程中不可避免的存在分解;比较了碳化硼涂层和粉末在高温下的氧化行为,发现涂层的氧化活化能比粉末要低,这是由于涂层和粉末相组成不同所造成的。

The change of pH value and viscosity in carbonization process of suspension were compared and analyzed.

目前,有关纳米碳酸钙的制备研究,主要集中在碳化反应工段的碳化反应设备结构、碳化反应条件优化、添加剂选择、气体分布器形式等方面[2~5],而就原料石灰的质量对纳米碳酸钙制备过程和产品质量的影响研究报道很少。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。