On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y_2O_3- Al_2O_3-Containing Silicon Nitride Ceramic

机译：局部晶粒边界化学对含高纯度Y_2O_3-AL_2O_3氮氧化硅陶瓷的宏观力学性能的影响

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The effects of grain-boundary chemistry on the mechanical properties of a high-purity silicon nitride ceramics were investigated,with specific emphasis on the role of oxygen.Variations in the grain-boundary oxygen content,through control of oxidizing heat treatments and sintering additives,was found to result in a transition in fracture mechanism from transgranular to intergranular fracture,with an associated increase in fracture toughness.This phenomenon is correlated to an oxygen-induced change in grain-boundary chemistry that appears to affect fracture by "weakening" the interface,facilitating debonding and crack advance along the boundaries,thereby enhancing the toughness by grain bridging.It is concluded that if the oxygen content in the thin grain-boundary films exceeds a lower limit,which is -0.87 equiv% oxygen content,then the interfacial structure and bonding characteristics favor intergranular debonding during crack propagation;otherwise,transgranular fracture ensues,with consequent low toughness.

机译：研究了晶界化学对高纯度氮化硅陶瓷力学性能的影响，具有特异性强调氧气的作用。通过控制氧化热处理和烧结添加剂来控制晶界氧含量的作用，被发现导致骨折机制的过渡到跨晶状体骨折，裂缝韧性相关的增加。本现象与晶体边界化学的氧气诱导的变化相关，似乎通过“弱化”界面影响裂缝，促进沿着边界的剥离和裂缝提前，从而提高谷物桥接的韧性。得出结论，如果薄晶界膜中的氧含量超过下限，这是-0.87当量的氧含量，那么界面结构和粘合特征在裂缝繁殖期间有利于晶间剥离;否则，随机骨折骨折顺序低韧性。

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《Symposium on Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry and Structure》|2005年||共6页
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A.Ziegler; J.M.McNaney; M.J.Hoffmann; R.O.Ritchie;
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4. On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y_2O_3- Al_2O_3-Containing Silicon Nitride Ceramic [C] . A.Ziegler, J.M.McNaney, M.J.Hoffmann, Symposium on Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry and Structure . 2005

机译：局部晶粒边界化学对含高纯度Y_2O_3-AL_2O_3氮氧化硅陶瓷的宏观力学性能的影响
5. Effects of grain-boundary chemistry on fracture mechanisms in highly pure silicon nitride ceramics. [D] . Ziegler, Alexander. 2001

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6. Additive Manufacturing of Silicon Nitride Ceramic Floatation Spheres with Excellent Mechanical Properties [O] . Hai Qi, Chenggui He, Peizhi Zhang, 2019

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7. On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y2O3-Al2O3-Containing Silicon Nitride Ceramic [O] . A. Ziegler, J. M. Mcnaney, M. J. Hoffmann, 2008

机译：局部晶界化学对高纯Y2O3-al2O3纳米陶瓷宏观力学性能的影响
8. Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y2O3-Al2O3-Containing Silicon Nitride Ceramic: Role of Oxygen [R] . Ziegler, A., McNaney, J. M., Hoffman, M. J., 2004

机译：局域晶界化学对高纯度Y2O3-al2O3纳米陶瓷宏观力学性能的影响：氧的作用

On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y_2O_3- Al_2O_3-Containing Silicon Nitride Ceramic

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