本文選題：n(Ca)∶n(P) + 激光熔覆��； 參考：《稀有金屬》2017年10期

【摘要】：激光熔覆過程中醫(yī)用鈦合金與混合粉末(CaHPO_4·2H_2O+CaCO_3+La_2O_3)因熱膨脹系數(shù)相差大而容易產(chǎn)生裂紋、氣孔等缺陷,故采用梯度設(shè)計方法在醫(yī)用鈦合金表面上制備一層具有生物活性的磷酸鈣陶瓷涂層。通過金相顯微鏡(OM),X射線衍射儀(XRD),顯微硬度計,甲基噻唑基四唑(MTT)比色法和倒置熒光顯微鏡對稀土氧化物L(fēng)a_2O_3添加量相同(0.6%)的不同鈣磷比激光熔覆磷酸鈣陶瓷涂層結(jié)合界面、物相、顯微硬度、細(xì)胞相對活性和細(xì)胞生長狀態(tài)進(jìn)行分析。試驗結(jié)果表明:通過OM觀察其橫截面積可以看出熔覆試樣分為基材、合金化層及陶瓷層3個區(qū)域,各區(qū)域間呈良好的冶金結(jié)合。在2θ在32°~33°附近,當(dāng)n(Ca)∶n(P)(原子比)=1.40~1.45時,其XRD圖譜中羥基磷灰石+β-磷酸三鈣(HA+β-TCP)的特征峰較高,表明其生成的生物活性相HA+β-TCP的量最多。顯微硬度結(jié)果表明n(Ca)∶n(P)值越大,涂層平均硬度越高。MTT比色法和倒置熒光顯微鏡觀察結(jié)果表明當(dāng)涂層n(Ca)∶n(P)=1.40時,吸光度值(OD)最大,生物陶瓷涂層上細(xì)胞數(shù)量最多且生長狀態(tài)良好,表明該涂層具有最佳的細(xì)胞相容性且有利于細(xì)胞的穩(wěn)定增殖與生長。
[Abstract]:During laser cladding, medical titanium alloy and mixed powder (CaHPO42H2OCaCO3) are apt to produce cracks, porosity and other defects due to the large difference in thermal expansion coefficient. Therefore, a bioactive calcium phosphate ceramic coating was prepared on the surface of medical titanium alloy by gradient design method. By means of metallographic microscope (OM) X-ray diffraction (XRD), microhardness meter, methyl thiazolyl tetrazolium (MTT) colorimetry and inverted fluorescence microscope, the interface and phase of different calcium phosphorus ratio laser cladding calcium phosphate ceramic coating with the same amount of rare-earth oxide La _ 2O _ 2O _ 3 (0.6%) were added. Microhardness, cell relative activity and cell growth state were analyzed. The test results show that the cladding sample is divided into three regions by OM observation: substrate alloying layer and ceramic layer. When the ratio of N (Ca): n (P) (atomic ratio) is 1.40 ~ 1.45, the characteristic peak of hydroxyapatite 尾 -tricalcium phosphate (HA 尾 -TCP) is higher in the XRD pattern, indicating that HA 尾 -TCP is the most bioactive phase. The results of microhardness showed that the higher the value of n (Ca): n (P) was, the higher the average hardness of the coating was. MTT colorimetry and inverted fluorescence microscope observation showed that when the coating n (Ca): n (P) was 1.40, the absorbance value (OD) was the highest. The number of cells on the bioceramics coating is the largest and the growth state is good, which indicates that the coating has the best cytocompatibility and is conducive to the stable proliferation and growth of the cells.
【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)度重點實驗室;
【基金】：國家自然科學(xué)基金項目(51362004)資助
【分類號】：TQ174.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 錢九紅;李喜坤;邱關(guān)明;丘泰;趙海濤;于洪浩;;激光熔覆稀土陶瓷涂層進(jìn)展[J];稀土;2006年02期

2 周香林,于家洪,陳傳中,胡漢起;激光熔覆陶瓷涂層的組織和性能的研究現(xiàn)狀[J];金屬熱處理;1996年07期

3 吳新偉,曾曉雁,朱蓓蒂,崔];激光熔覆金屬陶瓷技術(shù)研究概況[J];金屬熱處理;1996年04期

4 鄧遲;張亞平;高家誠;;激光熔覆生物陶瓷涂層和界面的研究[J];應(yīng)用激光;2006年01期

5 吳新偉,曾曉雁,朱蓓蒂,陶曾毅,崔];鎳基WC金屬陶瓷激光熔覆涂層的熔化燒損規(guī)律[J];金屬學(xué)報;1997年12期

6 陳傳忠,于慧君,侯勇,王國敦,于家洪,雷廷權(quán);45鋼表面激光熔覆WC/Co金屬陶瓷[J];陶瓷學(xué)報;1998年03期

7 曾曉雁,吳新偉,陶曾毅,朱蓓蒂,崔];激光熔覆Ni-WC金屬陶瓷層的耐磨性分析[J];金屬學(xué)報;1997年08期

8 吳濤;朱流;酈劍;姚繼蓬;;化學(xué)沉積法合成WC/Co粉體及其激光熔覆涂層的制備[J];材料熱處理學(xué)報;2006年06期

9 吳維，，王茂才，喻家慶;激光熔覆玻璃涂層[J];無機(jī)材料學(xué)報;1994年02期

10 張維平,劉碩,季首華,馬玉濤;激光熔覆金屬陶瓷細(xì)晶復(fù)合涂層晶粒細(xì)化行為研究[J];材料工程;2004年08期

相關(guān)碩士學(xué)位論文 前2條

1 陳德勝;氣磨粉碎腔損傷分析及其再制造研究[D];燕山大學(xué);2014年

2 霍立軍;耐火磚模具的再制造及疲勞性能研究[D];燕山大學(xué);2014年

本文編號：2086506