Tarr R R
J Biomed Mater Res. 1979 Sep;13(5):717-27. doi: 10.1002/jbm.820130505.
A new porous vitreous carbon material under development for use in orthopedic applications was investigated. Specimens were machined to appropriate sizes and fractured in one of the following modes: compression, cantilevered bending, or axial torsion. Scanning electron microscopy (SEM) was used to examine surface and internal features. Characteristics of a brittle, glassy material were noted. Findings included internal voids which appeared as craters, patches of whiskerlike fibrils, and edge impurities. Numerous microcracks caused by mechanical shaping and handling were the most remarkable structural defects. Pore channels which would allow bony ingrowth ranged in size from 50--500 micrometers with the majority between 200 and 300 micrometers. This study of porous vitreous carbon points to the need for stricter quality control in manufacturing, alternative methods for shaping and handling, and careful consideration in design and usage of a brittle material with marginal limits of safety for biomedical applications.
对一种正在研发用于骨科应用的新型多孔玻璃碳材料进行了研究。将样本加工成合适尺寸，并以以下模式之一进行断裂：压缩、悬臂弯曲或轴向扭转。使用扫描电子显微镜（SEM）检查表面和内部特征。观察到一种脆性玻璃状材料的特征。发现包括呈现为坑洼的内部空隙、晶须状纤维束以及边缘杂质。由机械加工和处理导致的大量微裂纹是最显著的结构缺陷。允许骨长入的孔隙通道尺寸范围为50 - 500微米，大多数在200至300微米之间。这项对多孔玻璃碳的研究表明，在制造过程中需要更严格的质量控制、替代的成型和处理方法，以及在设计和使用具有生物医学应用安全边际有限的脆性材料时要仔细考虑。
