Physical characteristics of Ti-6A1-4V implants fabricated by electrodischarge compaction.
Physical characteristics of Ti-6A1-4V implants fabricated by electrodischarge compaction.
复制标题
通过放电压实制造的 Ti-6A1-4V 植入物的物理特性。
DOI：
10.1002/jbm.820251202
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Kopczyk,RA
中科院分区：
文献类型：
--
作者：
Okazaki,K;Lee,WH;Kim,DK;Kopczyk,RA
在使用新的放电压实技术制造后，对Ti-6Al-4V植入物的物理特性进行了评价。将Ti-6Al-4V雾化粉末装入Pyrex管（3.3 mm ID）中，并在空气中接受高压、高电流密度脉冲，持续时间小于300 μs。从电容器组（240、480或720 μF）施加单脉冲（1.0、1.5、2.0和2.5 KJ/g粉末），以生产具有多孔表面层的固体芯植入物。通过显微镜评价植入物的芯尺寸、颈部尺寸、孔径、颗粒结构和结合的氧化膜。还评价了硬度。将植入物与市售Ti-6Al-4V粉末进行比较。随着能量和电容的增加，核尺寸增加，孔径减小。核心由等轴晶粒组成，在晶界处没有氧化物。多孔层，由颗粒连接在三维颈部，是免费的氧化膜在连接界面。颈部尺寸随着输入能量和电容的增加而增加。芯部、颈部和多孔颗粒的硬度读数导致读数高于或类似于对照材料。放电压实没有改变压实过程中的物理特性。
Physical characteristics of a Ti‐6Al‐4V implant were evaluated following fabrication using a new electrodischarge compaction technique. Ti‐6Al‐4V atomized powders were loaded into Pyrex tubes (3.3 mm ID) and subjected to a highvoltage, high‐current‐density pulse in air for a period of less than 300 μs. Single pulses (1.0, 1.5, 2.0 and 2.5 KJ/grampowder) were applied from a capacitor bank (240, 480 or 720 μF) to produce solid core implants with porous surface layers. Implants were evaluated microscopically for core size, neck size, pore size, grain structure, and incorporated oxide film. Hardness was also evaluated. Implants were compared with Ti‐6Al‐4V commercial powders. Core size increased and pore size decreased with increases in energy and capacitance. The cores were composed of equiaxed grains which were free of oxide at the grain boundary. Porous layers, consisting of particles connected in three dimensions by necks, were free of oxide films at the connecting interfaces. Neck size increased with increases in input energy and capacitance. Hardness readings of the core, necks, and porous particles resulted in readings higher than or similar to control materials. Electrodischarge compaction did not alter the physical characteristics during compaction.