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首页> 外文会议>International Conference on Advanced Ceramics and Composites >ADVANCED MEASUREMENTS OF INDENTATION FRACTURE RESISTANCE OF ALUMINA BY THE POWERFUL OPTICAL MICROSCOPY FOR SMALL CERAMIC PRODUCTS
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ADVANCED MEASUREMENTS OF INDENTATION FRACTURE RESISTANCE OF ALUMINA BY THE POWERFUL OPTICAL MICROSCOPY FOR SMALL CERAMIC PRODUCTS

机译：通过强大的光学显微镜进行氧化铝对小陶瓷产品的强调裂缝抗性的先进测量

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A round robin on indentation fracture resistance, K_(IFR) of two types of alumina with different purity was conducted by thirteen laboratories in order to confirm the reliability of the IF method using powerful optical microscopy. Our new approach employed both an objective lens of 40x or 50x and a traveling stage to reduce the measuring error of crack lengths. The standard deviations of K_(IFR) reported for the two samples indented at 98 N were 0.3 and 0.2 MPa-m~(1/2) for mean K_(IFR) of 4.3 and 3.6 MPa-m~(1/2), respectively, indicating good matching between different laboratories. The grand averages of K_(IFR) for both samples from all participants were only 0.4 MPa-m~(1/2) higher than those of K_(IFR) re-measured by the authors using the returned samples, which demonstrated a little room for improvement of the new technique. The results in this study together with the previous two round robins for SiC and Si_3N_4 ceramics revealed that the reliability of the IF method has reached a sufficient level since the reproducibility of K_(IFR) for the three major ceramics was verified reasonable.
机译：在十三实验室进行了两种具有不同纯度的两种氧化铝的压痕裂缝抗性的循环裂缝抗性，以确认使用强大的光学显微镜的IF方法的可靠性。我们的新方法采用了40倍或50倍的物镜和行驶阶段，以减少裂缝长度的测量误差。报告于98 n缩进的两个样品的K_（IFR）的标准偏差为4.3和3.6MPa-m〜（1/2）的平均K_（IFR）的0.3和0.2MPa-m〜（1/2），分别表明不同实验室之间的良好匹配。来自所有参与者的两个样本的K_（IFR）的大平均值仅比作者使用返回的样品重新测量的0.4MPa-m〜（1/2）高于K_（IFR），这展示了一个小空间提高新技术。本研究的结果与先前的SiC和Si_3N_4陶瓷一起显示出的是，IF方法的可靠性已达到足够的水平，因为验证了三个主要陶瓷的K_（IFR）的再现性。

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