Abstract This study delves into three main subjects: (I) A strong definition on the variation of fundamental key mechanical design performance and general mechanical characteristic features founded on the formation of active operable slip systems and elimination of structural problems in the Tm substituted Bi-site Bi2.1-xTmxSr2.0Ca1.1Cu2.0Oy (0.00 ≤x≤ 0.30) ceramic materials; (II) Preference of propagation of cracks and dislocation movements (III) An examination of differentiation in the load-independent microhardness parameters in the saturation limit regions with the Bi/Tm partial replacement. It is found that all the mechanical performance (mechanical strength, stiffness, durability and resistant towards to the failure by fatigue) properties considerably improve with the increment in the Bi/Tm substitution level up to x=0.07 due to the augmentation in the new active operable slip systems and crystallinity quality of Bi2.1Sr2.0Ca1.1Cu2.0Oy (Bi-2212) system. Accordingly, in case of the optimum Bi/Tm substitution the propagation of dislocation and crack movements is more and more easily controlled in the Bi-2212 ceramic system. However, the excess Tm concentrations in the ceramic system make the stress-induced phase transformation remarkably activate as a consequence of the degradation in the crack orientation and geometry. Hence, any deformation at even lower applied test loads is much more permanent and non-recoverable due to the enhancement of unconstrained dislocation motions and especially entanglement of cracks and dislocations. This fact is also confirmed from the reduction of typical indentation size effect (ISE) behavior in the event of excess Tm concentration. To conclude, the optimum Bi/Tm partial replacement in the Bi-2212 crystal structure is successful to improve the economic lives of Bi-2212 inorganic ceramics in the new, novel, innovative, feasible and potential design areas for the universe economy.

中文翻译：

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三价Bi/Tm部分取代对Bi-2212晶体结构中活性可操作滑移系统的作用

摘要 本研究深入研究了三个主要课题： (I) 基于形成主动可操作滑移系统和消除 Tm 取代双位点结构问题，对基本关键机械设计性能和一般机械特性的变化进行了强有力的定义。 Bi2.1-xTmxSr2.0Ca1.1Cu2.0Oy（0.00≤x≤0.30）陶瓷材料；(II) 裂纹扩展和位错运动的偏好 (III) 用 Bi/Tm 部分替换对饱和极限区域中与载荷无关的显微硬度参数的差异进行检查。发现所有机械性能（机械强度、刚度、耐久性和抗疲劳破坏）性能随着 Bi/Tm 替代水平的增加而显着提高，直至 x=0。07 由于新的主动可操作滑移系统的增强和 Bi2.1Sr2.0Ca1.1Cu2.0Oy (Bi-2212) 系统的结晶质量。因此，在最佳 Bi/Tm 替代的情况下，Bi-2212 陶瓷系统中的位错和裂纹运动的传播越来越容易控制。然而，由于裂纹取向和几何形状的退化，陶瓷体系中过量的 Tm 浓度使应力诱导的相变显着激活。因此，由于不受约束的位错运动的增强，尤其是裂纹和位错的纠缠，在更低的测试载荷下的任何变形都更加持久且不可恢复。在 Tm 浓度过高的情况下，典型的压痕尺寸效应 (ISE) 行为的减少也证实了这一事实。总之，Bi-2212晶体结构中的最佳Bi/Tm部分置换成功地提高了Bi-2212无机陶瓷在宇宙经济新的、新颖的、创新的、可行的和潜在的设计领域的经济寿命。