本文選題：生物材料 + Fe-Zn合金　； 參考：《中國(guó)表面工程》2017年06期

【摘要】：鐵具有較高的力學(xué)性能和良好的生物相容性,是極具潛力的可降解血管支架材料,但難以在規(guī)定的治療期內(nèi)完成降解是其面臨的主要問(wèn)題。在前期工作中利用電沉積技術(shù)制備出Fe-5Zn合金。為進(jìn)一步優(yōu)化其顯微組織,將陰極平均電流密度由3.0 A/dm~2降至1.0 A/dm~2,控制電解液pH值在2.3左右,電沉積制備出成分均勻、組織細(xì)小致密,且具有(112)擇優(yōu)取向的Fe-5Zn單相固溶體合金。該合金經(jīng)800℃氬氣保護(hù)再結(jié)晶退火后,顯微硬度由681 HV_(0.1)降至287 HV_(0.1),材料韌性得到改善。同時(shí)合金中有耐蝕性較高的鐵、鋅氧化物相析出,增加了微陰極數(shù)量。動(dòng)電位極化曲線測(cè)量和模擬體液靜態(tài)浸泡試驗(yàn)結(jié)果顯示,熱處理后的Fe-5Zn合金自腐蝕電位為-0.89 V,自腐蝕電流密度為1.77×10~(-6) A·cm~(-2),腐蝕速度則為0.259 mg·cm~(-2)·d~(-1),降解性能優(yōu)于常規(guī)純鐵。
[Abstract]:Iron has high mechanical properties and good biocompatibility. It is a potential biodegradable stent material, but it is difficult to complete degradation within the prescribed treatment period. The Fe-5Zn alloy was prepared by electrodeposition in the previous work. In order to further optimize the microstructure, the average current density of the cathode was reduced from 3.0 A/dm~2 to 1.0 A / dmm2, and the pH value of the electrolyte was controlled around 2.3. The single phase Fe-5Zn solid solution alloy with uniform composition, fine and compact microstructure and preferred orientation was prepared by electrodeposition. After recrystallization annealing at 800 鈩，

本文編號(hào)：1832941