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激光熔覆鈦基生物陶瓷涂層的制備及其界面研究
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甘肅省科技攻關(guān)項目(2GS057-A52-001-03)


Preparation and Interface Research of Bioceramic Coating by Laser Cladoping
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    摘要:

    用高功率CO2激光器在Ti-6Al-4V合金表面制備含有生物活性陶瓷相的梯度生物陶瓷涂層。利用掃描電鏡(SEM)、X射線衍射(XRD)和電子探針(EPMA)等對熔覆層和界面的顯微組織、相組成及成分進(jìn)行分析。結(jié)果表明：激光熔覆復(fù)合涂層中生成了羥基磷灰石和磷酸三鈣等生物活性相，凹凸不平的表面出現(xiàn)網(wǎng)絡(luò)交錯的片狀結(jié)構(gòu)和微孔(孔徑為0.5~2 μm)，有利于新骨沿著表面及內(nèi)部連通微孔攀附生長。涂層與基體界面處存在涂層成分(Ca, P)與基體成分(Ti, Al, V)的互擴(kuò)散，涂層與基體通過擴(kuò)散反應(yīng)形成牢固的冶金結(jié)合。殘余應(yīng)力在界面結(jié)合區(qū)域出現(xiàn)峰值，陶瓷層和過渡層界面附近為221 MPa，涂層與基體界面附近為108 MPa，從涂層到基體殘余應(yīng)力逐漸減小

    Abstract:

    Based on a high power CO2 laser, the bioceramic coating included bioactive phases was fabricated on the surface of Ti-6Al-4V alloy. The morphology, 他the phase composition and the elemental distribution of the composite and interface were analyzed by SEM, XRD and EPMA. The results show that the bioceramic coating contains such bioactive phases as hydroxyapatite and tricalcium phosphate during laser cladoping. And the interlaced flake structure and micropores of about 0.5~2 μm in size exist on the surface of accidented gradient bioceramic coating, suitable to grow new bone along with the surface and micropore. A solid metallurgically bond to the titanium alloy substrate with the bioceramic coating is set up by the diffusion between the elements of coating (Ca, P) and substrate (Ti, Al, V). The residual stress gradually decreases from coating to substrate, is 221 MPa at the interface between bioceramic coating and transition layer, and 108 MPa between coating and substrate

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鄭 敏,樊 丁,李秀坤,張建斌,劉其斌.激光熔覆鈦基生物陶瓷涂層的制備及其界面研究[J].稀有金屬材料與工程,2009,38(11):2004~2007.[Zheng Min, Fan Din, Li Xiukun, Zhang Jianbin, Liu Qibin. Preparation and Interface Research of Bioceramic Coating by Laser Cladoping[J]. Rare Metal Materials and Engineering,2009,38(11):2004~2007.]
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  • 收稿日期:2008-11-12
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