【摘要】：采用SEM、TEM、XRD和EDX等試驗(yàn)手段對(duì)經(jīng)150~400 V電壓微弧氧化處理后工業(yè)純鈦(Ti)和Ti-40%Nb(Ti-40Nb)(質(zhì)量分?jǐn)?shù))合金表面磷酸鈣(CaP)涂層的顯微組織、物理和力學(xué)性能以及化學(xué)特性進(jìn)行研究。結(jié)果表明:在兩種基體上所得到的涂層厚度、粗糙度和結(jié)構(gòu)元尺寸顯示出相似的線性特征且與處理電壓有關(guān)。掃描電鏡(SEM)分析表明,磷酸鈣涂層為多孔形態(tài),表面呈粗糙浮雕狀。XRD和TEM分析結(jié)果表明,微弧磷酸鈣涂層呈非晶態(tài)結(jié)構(gòu)。當(dāng)氧化電壓增加至300~400 V時(shí),涂層中形成了結(jié)晶相,如CaHPO_4、β-Ca_2P_2O_7。經(jīng)過(guò)退火處理,涂層中形成復(fù)雜的多相結(jié)構(gòu),如CaTi_4(PO_4)6、β-Ca_2P_2O_7、TiP_2O_7、TiNb(РО_4)3、TiO_2、NbO_2和Nb_2O_5。當(dāng)氧化電壓為200~250 V、處理時(shí)間為5~10 min時(shí),在工業(yè)純鈦和Ti-40Nb合金表面形成的涂層顯示出最佳特性,其厚度為40~70μm,孔隙率為20%~25%,粗糙度(Ra)為2.5~5.0μm,粘合強(qiáng)度為15~30 MPa,Ca與P最佳摩爾比為0.5~0.7。
[Abstract]:The microstructure of calcium phosphate (CaP) coating on industrial pure titanium (Ti) and Ti-40%Nb (Ti-40Nb) (mass fraction) alloy treated by 150 脳 400V voltage micro-arc oxidation was studied by SEM,TEM,XRD and EDX. The physical and mechanical properties and chemical properties were studied. The results show that the coating thickness, roughness and structural element size on the two kinds of substrate show similar linear characteristics and are related to the treatment voltage. Scanning electron microscope (SEM) analysis showed that the calcium phosphate coating was porous and the surface was rough relief. XRD and TEM analysis showed that the micro-arc calcium phosphate coating was amorphous. When the oxidation voltage increases to 300 鈮，

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