Jo Y J, Kim Y H, Jo Y H, Seong J G, Chang S Y, Van Tyne C J, Lee W H
J Nanosci Nanotechnol. 2014 Nov;14(11):8439-44. doi: 10.1166/jnn.2014.9933.
A single pulse of 1.5 kJ/0.7 g of atomized spherical Ti powder from 300 μF capacitor was applied to produce the porous-surfaced Ti implant compact by electro-discharge-sintering (EDS). A solid core surrounded by porous layer was self-consolidated by a discharge in the middle of the compact in 122 μsec. Average pore size, porosity, and compressive yield strength of EDS Ti compact were estimated to be about 68.2 μm, 25.5%, and 266.4 MPa, respectively. Coatings with hydroxyapatite (HAp) on the Ti compact were conducted by electrostatic-spray-deposition (ESD) method. As-deposited HAp coating was in the form of porous structure and consisted of HAp particles which were uniformly distributed on the Ti porous structure. By heat-treatment at 700 degrees C, HAp particles were agglomerated each other and melted to form a highly smooth and homogeneous HAp thin film consisted of equiaxed nano-scaled grains. Porous-surfaced Ti implant compacts coated with highly crystalline apatite phase were successfully obtained by using the EDS and ESD techniques.
从300微法电容器中施加单个1.5千焦/0.7克雾化球形钛粉的脉冲，通过放电烧结（EDS）制备具有多孔表面的钛植入体坯块。在122微秒内，坯块中间的放电使由多孔层包围的实心芯自固结。EDS钛坯块的平均孔径、孔隙率和抗压屈服强度估计分别约为68.2微米、25.5%和266.4兆帕。采用静电喷涂沉积（ESD）方法在钛坯块上涂覆羟基磷灰石（HAp）涂层。沉积态的HAp涂层为多孔结构形式，由均匀分布在钛多孔结构上的HAp颗粒组成。通过在700℃下热处理，HAp颗粒相互团聚并熔化，形成由等轴纳米级晶粒组成的高度光滑且均匀的HAp薄膜。通过使用EDS和ESD技术，成功获得了涂覆有高结晶度磷灰石相的多孔表面钛植入体坯块。
