本文選題：懸浮液等離子噴涂 + 氟磷灰石��； 參考：《華中科技大學(xué)》2012年碩士論文

【摘要】：在鈦合金（Ti6Al4V）基體表面涂覆具有生物活性的生物陶瓷涂層，綜合利用鈦合金的機(jī)械性能和生物陶瓷的生物活性，是當(dāng)今最具應(yīng)用前景的骨植入體研究熱點(diǎn)之一。羥基磷灰石（HA）是目前研究最為成熟的生物陶瓷材料，具有優(yōu)異的生物相容性和骨誘導(dǎo)性。然而，，Ti6Al4V與HA的力學(xué)性能差別大，基體和涂層界面結(jié)合強(qiáng)度低，一般都低于20MPa；HA在體液環(huán)境中溶解速度快，涂層容易造成脫落。氟磷灰石（FA）能促進(jìn)磷酸鈣礦化和結(jié)晶化，同時(shí)FA在體液中溶解速度比HA慢。FA的引入可以改善涂層結(jié)構(gòu)性能。 本論文通過對(duì)鈦合金基體進(jìn)行微弧氧化預(yù)處理，在基體表面形成多孔二氧化鈦（TiO2）層，用懸浮液等離子噴涂方法依次涂覆FA層和HA層，制備TiO2-FA-HA復(fù)合結(jié)構(gòu)的生物陶瓷涂層。利用掃描電鏡（SEM）、X射線衍射儀（XRD）、傅里葉紅外光譜儀（FTIR）分析涂層形貌結(jié)構(gòu)及其化學(xué)相組成，采用拉伸機(jī)測(cè)量涂層的結(jié)合強(qiáng)度。 本文主要研究了羥基磷灰石懸浮液的制備方法和懸浮液等離子噴涂工藝參數(shù)對(duì)涂層性能的影響。懸浮液的適宜濃度為：5wt%的羥基磷灰石，0.5wt%的十水焦磷酸鈉（Na_4P_2O_7·10H_2O）作為分散劑。HA懸浮液的Zeta電位為-33.8mV，平均粒徑分布為76.02nm；FA懸浮液的Zeta電位為-34.0mV，平均粒徑分布為70.17nm。HA涂層的結(jié)合強(qiáng)度為24.2MPa，F(xiàn)A涂層的結(jié)合強(qiáng)度為26.8MPa。涂層出現(xiàn)CaO，α-TCP和β-TCP等非晶相，通過后期800℃熱處理可以提高涂層的結(jié)晶度。結(jié)果表明制備的涂層具有良好的結(jié)晶度和結(jié)合強(qiáng)度。
[Abstract]:It is one of the most promising bone implants to coat bioceramic coatings with bioceramics on Ti 6Al4V substrates and to make full use of the mechanical properties of titanium alloys and bioceramics. Hydroxyapatite (HA) is the most mature bioceramic material with excellent biocompatibility and bone inductivity. However, the mechanical properties of Ti6Al4V and HA differ greatly, the bonding strength between substrate and coating is low, the dissolution rate of Ti6Al4V is lower than 20MPA HA in humoral environment and the coating is easy to fall off. Fluoroapatite (FA) can promote the mineralization and crystallization of calcium phosphate, and the incorporation of FA in body fluid can improve the structure and properties of the coating. In this paper, a porous TIO _ 2 / TIO _ 2 layer was formed on the surface of titanium alloy by micro-arc oxidation pretreatment. The ceramic coating with TIO _ 2-FA-HA composite structure was prepared by suspension plasma spraying method, which was coated with FA layer and HA layer in turn. The morphology, structure and chemical phase composition of the coating were analyzed by SEM and FTIR. The bonding strength of the coating was measured by tensile machine. In this paper, the preparation method of hydroxyapatite suspension and the effect of plasma spraying parameters on the coating properties were studied. The optimum concentration of the suspension was 0.5 wt% hydroxyapatite and 0.5 wt% sodium pyrophosphate (Na4P2O7H2O2) as dispersant. The Zeta potential of HA suspension was -33.8 MV, and the average particle size distribution was 76.02 nm. The Zeta potential of FA suspension was -34.0mV, and the average particle size distribution was 70.17nm.HA coating. Amorphous phases such as Cao, 偽 -TCP and 尾 -TCP appear in the coating, and the crystallinity of the coating can be improved by heat treatment at 800 鈩

本文編號(hào)：2024614