Bucciotti Francesco, Mazzocchi Mauro, Bellosi Alida
Institute for Science and Technology for Ceramics, National Research Council, Turin, Italy.
J Appl Biomater Biomech. 2010 Jan-Apr;8(1):28-32.
In this work we investigated the suitability of electroconductive silicon nitride/titanium nitride composite for biomedical implantable devices with particular attention on the processing route that allows the net-shaping of complex components by electrical discharge machining (EDM).
The composite, constituted mainly of a beta-Si3N4, dispersed TiN grains and a glassy grain boundary phase, exhibited a low density and high hardness, strength and toughness. Bulk, surface characteristics and properties of the Si3N4-TiN composite were analyzed. After the EDM process, the microstructure of the machined surface was examined.
The obtained results showed that the Si3N4-TiN ceramic composite together with the EDM manufacturing process might potentially play a key role in implantable load-bearing prosthesis applications.
在本研究中，我们研究了导电氮化硅/氮化钛复合材料在生物医学植入设备中的适用性，特别关注通过放电加工（EDM）实现复杂部件净成型的加工路线。
该复合材料主要由β-Si3N4、弥散的TiN颗粒和玻璃态晶界相组成，具有低密度、高硬度、高强度和高韧性。分析了Si3N4-TiN复合材料的整体、表面特征和性能。在放电加工后，检查了加工表面的微观结构。
所得结果表明，Si3N4-TiN陶瓷复合材料与放电加工制造工艺可能在植入式承重假体应用中发挥关键作用。
