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- Keywords ethylene pyrolyzer;furnace tube;high temperature oxidation;corrosion;metallographic analysis;crystal grain;grain boundary; 乙烯裂解炉;炉管;高温氧化;腐蚀;金相分析;晶粒;晶界;
- crystal grain boundary 晶粒界面
- Gold occurs in a form of crystal grain or fine grain in the quartz veins ... 金以粗晶状单体自然金及细粒金存在于石英脉及硫化物中。
- The deformation mechanism of AZ91D superplasticity is grain boundary sliding. 挤压态AZ91D镁合金超塑性变形的主要机制为晶界滑移机制。
- Impurities tend to segregate at grain boundaries. 杂质常常在晶粒间界偏析。
- Two area defects are twins and grain boundaries. 有两种面积缺陷,即孪生和晶粒间界。
- Because the microcrack exists in the organization, the plasticity reduces with the crystal grain thinning. 因为组织中微裂纹的存在，随着晶粒的细化塑性反而减小；
- The crystal grain shape of desulphurization gypsum affects the performance of gypsum products. 脱硫石膏的晶体颗粒形态是影响石膏制品性能的重要因素之一。
- The grain boundary secondary phase is an imporrant microstructure component in AIN ceram-ics,having significant effect on thermal conductivity. 晶界第二相是AIN陶瓷显微结构的重要组成部分，对AIN陶瓷的热导率有重大的影响。
- Crystal grain size along the normal direction of the (110), is one of the important factors affecting the slope factor. 合金(110)面法线方向上晶粒尺度的大小是影响合金放氢平台斜率系数的因素之一。
- And the energies of interdiffusion and grain boundary diffusion have been figured out by the Arrhenius equation. 从Arrhenius方程得出互扩散及晶界扩散激活能。
- The high life LCF cracks of DZ4 superalloy favorably initiate at the transverse segment of longitudinal grain boundary. 定向凝固DZ4合金高寿命低周疲劳裂纹易于萌生于试样内部或亚表面的柱状晶界.
- The crystal grains grow up accompany the temperature rising. 随温度的升高,出现晶粒长大的现象。
- In the late stage of the deformation, with the grain size growing up, the grain boundary can emit partial dislocations. 在晶界处及附近有台阶界面结构， 以及与台阶形状相对应的应力场衬度。
- In addition, a grain boundary is formed at the coalescence boundary of neighboring growth fronts. 在相邻生长前沿所形成的合并界面处形成晶界;
- Photomicrograph of alloy overheating showes fraction grain boundary coarsening and melt-back delta at first. 其过烧特征最初表现为晶界局部加宽和复熔三角形的出现。
- It shows that the diamond seed crystal is also dodecahedron,coming from a crystal grain first, then growing as an dodecahedron diamond. 经分析发现,该金刚石晶体首先由晶核发育成菱形十二面体金刚石籽晶,再由此籽晶生长成菱形十二面体金刚石晶体。
- Both of the properties depend on crystal grain size of silica that means its size smaller,its anti burst biality greater and its reductibility better. 硅石的抗爆性和还原性能取决于硅石的晶粒度,晶粒小抗爆率高,还原性能好。
- As the continuous chain distribution in grain boundary of T6 state,fracture toughness and stress crossion resistance are low. T6工艺晶界为链状连续分布，断裂韧性和抗应力腐蚀性能较差；
- The element content at grain boundary of advanced Fe-based superalloy GH871 containing Nb has been studied by Perkin-Elmer PHI 595 Auger spectrometer. 利用PERKIN ELMERPHI 5 95型俄歇谱仪研究了新型含铌铁基高温合金GH871的晶界上各元素的含量。
