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首页> 外文期刊>Materials Science and Engineering >Optimization of bond strength between gold alloy and porcelain through a composite interlayer obtained by powder metallurgy
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Optimization of bond strength between gold alloy and porcelain through a composite interlayer obtained by powder metallurgy

机译：通过粉末冶金获得的复合中间层优化金合金与瓷器之间的结合强度

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摘要

The purpose of this study was to evaluate the influence of a composite interlayer (at the metal-ceramic interface) on the shear bond strength of a metal-ceramic composite when compared with a conventional porcelain fused to metal (PFM). Several metal-ceramic composites specimens were produced by hot pressing. To identify which was the best composition for the interlayer several composites, with different relations of metal/ceramic volume fraction, were bonded to metal and to ceramic substrates. The bond strength of the composites to substrates was assessed by the means of a shear test performed in a universal test machine (crosshead speed: 0.5 mm/min) until fracture. Some interfaces of fractured specimens as well as unde-stroyed interface specimens were examined with optical microscope and scanning electron microscope (SEM/EDS). The shear bond strength results for all composites bonded to metal and to ceramic substrates were significantly higher (>150 MPa) than those registered in the upper range of conventional porcelain fused to metal (PFM) techniques (～80 MPa). The use of a composite interlayer proved to enhance metal/ceramic adhesion in 160%.
机译：这项研究的目的是评估与传统的熔合金属陶瓷（PFM）相比，复合中间层（在金属-陶瓷界面处）对金属-陶瓷复合材料的剪切粘结强度的影响。通过热压生产了几种金属陶瓷复合材料样品。为了确定哪种是中间层的最佳组成，将具有不同金属/陶瓷体积分数关系的几种复合材料粘合到金属和陶瓷基材上。通过在通用试验机（十字头速度：0.5mm / min）中进行直至断裂的剪切试验，评估复合材料与基材的粘合强度。用光学显微镜和扫描电子显微镜（SEM / EDS）检查了断裂样品的某些界面以及未破坏的界面样品。与金属和陶瓷基体粘结的所有复合材料的剪切粘结强度结果均显着高于（> 150 MPa），高于传统的与金属熔合（PFM）技术的上限（〜80 MPa）。事实证明，使用复合中间层可将金属/陶瓷的粘合力提高160％。

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