本文關(guān)鍵詞：稀土氧化物添加量對(duì)激光熔覆磷酸鈣陶瓷涂層組織性能的影響　出處：《稀有金屬》2016年05期 　論文類型：期刊論文

  更多相關(guān)文章： 稀土氧化物 激光熔覆 磷酸鈣陶瓷 涂層

【摘要】：β-磷酸三鈣(β-TCP)和羥基磷灰石(HA)被視為優(yōu)良的生物活性材料。本文利用激光熔覆技術(shù)在鈦合金(Ti6Al4V)表面制備一層含β-TCP和HA的稀土氧化物摻雜磷酸鈣陶瓷涂層,通過光學(xué)顯微鏡(OM),X射線衍射(XRD),掃描電鏡(SEM)和顯微硬度計(jì)分別對(duì)陶瓷涂層的結(jié)合界面、物相、表面形貌及顯微硬度進(jìn)行分析。試驗(yàn)結(jié)果表明:基材與陶瓷層呈冶金結(jié)合,熔覆試樣可分為基材、熱影響區(qū)、合金化區(qū)及陶瓷熔覆層4個(gè)區(qū)域;當(dāng)La2O3添加量為0.6%(質(zhì)量分?jǐn)?shù))時(shí),涂層主要含CaTiO_3,Ti O,β-TCP和HA等物相;通過掃描電鏡觀察涂層表面形貌,發(fā)現(xiàn)稀土氧化物L(fēng)a_2O_3的含量對(duì)涂層裂紋敏感性有較大影響,當(dāng)稀土氧化物L(fēng)a_2O_3添加量為0.6%時(shí),涂層表面較為平整,存在少量孔洞及裂紋,此時(shí)涂層硬度最大,達(dá)到HV 1971。
[Abstract]:Beta tricalcium phosphate (beta -TCP) and hydroxyapatite (HA) are considered as excellent bioactive materials. The use of laser cladding technology in titanium alloy (Ti6Al4V) layer containing beta -TCP and HA rare earth oxide doped calcium phosphate ceramic coating surface prepared by optical microscopy (OM), X ray diffraction (XRD), scanning electron microscopy (SEM) and micro hardness tester respectively on ceramic coating interface and phase the surface morphology, and hardness analysis. The test results show that the substrate and the ceramic layer is metallurgical bonding, cladding samples can be divided into the alloying zone and ceramic cladding material, the heat affected zone, 4 regions; when the amount of La2O3 is 0.6% (mass fraction), the coating mainly containing CaTiO_3, Ti O, beta -TCP and HA phase; the surface morphology of the coating was observed by scanning electron microscope, found the content of rare earth oxides La_2O_3 have great influence on the coating crack sensitivity, when the rare earth oxide content of La_2O_3 was 0.6%, the coating surface is smooth, there exists a small hole and crack, the maximum hardness of the coating reached HV, 1971.
【作者單位】： 貴州大學(xué)材料與冶金學(xué)院;貴州省材料結(jié)構(gòu)與強(qiáng)度重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(51362004)資助
【分類號(hào)】：TG178
【正文快照】： β-磷酸三鈣的化學(xué)式為β-Ca3(PO4)2,簡稱β-TCP,因與人體骨骼無機(jī)成分相似,易生物降解吸收、無毒副作用等性能,一直受到學(xué)者們密切關(guān)注,被視為優(yōu)良的生物活性降解材料[1-3]。羥基磷灰石化學(xué)式為Ca10(PO4)6(OH)2,簡稱HA,又稱羥基磷酸鈣,是目前研究較多的一種生物活性材料[4-7]，

本文編號(hào)：1340365