本文選題：多孔鈦 + 鈦網(wǎng)層疊燒結(jié)法�。� 參考：《稀有金屬材料與工程》2017年08期

【摘要】：因?yàn)槿梭w植入物的楊氏模量遠(yuǎn)大于骨組織將會(huì)帶來(lái)應(yīng)力屏蔽,所以降低人體植入物的楊氏模量對(duì)于提高植入物器件在人體的服役壽命具有十分重要的作用。采用一種新型的鈦網(wǎng)層疊燒結(jié)法制備多孔鈦,研究多孔鈦的微觀孔形貌,壓縮變形特點(diǎn)和具有可控性的多孔鈦孔隙率、孔徑大小和孔分布對(duì)多孔鈦微觀組織及力學(xué)性能的影響。結(jié)果表明:鈦網(wǎng)層疊燒結(jié)法制備的多孔鈦在微觀結(jié)構(gòu)上,不同方向具有不同的微觀孔形貌,因而使多孔鈦具有異性;軸向壓縮應(yīng)力應(yīng)變曲線表明多孔鈦具有平穩(wěn)、光滑的彈性和塑性變形行為;當(dāng)增加孔隙率,或相同孔隙率下,減小孔名義尺寸,改變孔分布由規(guī)則到錯(cuò)排時(shí),均能降低多孔鈦的彈性模量。因此,通過(guò)調(diào)控多孔鈦的這些結(jié)構(gòu)參數(shù),可使其具有與不同骨組織相匹配的力學(xué)性能和利于骨組織長(zhǎng)入的孔徑尺寸。作為植入物材料的多孔鈦具有的這種與骨組織適配的孔結(jié)構(gòu)和力學(xué)性能,在延長(zhǎng)植入物器件的服役壽命上具有很大的潛力。
[Abstract]:Because the Young's modulus of human implants is much larger than that of bone tissue, it is very important to reduce the Young's modulus of implants in order to improve the service life of implants. Porous titanium was prepared by a new titanium mesh stacking sintering method. The microstructure of porous titanium, the characteristics of compression deformation and the effects of porous titanium porosity, pore size and pore distribution on the microstructure and mechanical properties of porous titanium were studied. The results show that the porous titanium prepared by the titanium mesh stacking sintering method has different micropore morphology in different directions, which makes porous titanium have heterogeneity, and the axial compression stress-strain curve shows that porous titanium has stable microstructure. The elastic modulus of porous titanium can be reduced by decreasing the nominal size of the pore and changing the distribution of the pore from regular to staggered when the porosity or the same porosity increases the elastic and plastic deformation behavior of the porous titanium. Therefore, by adjusting these structural parameters of porous titanium, it can have mechanical properties matching different bone tissues and favorable pore size for bone tissue growth. Porous titanium, as an implant material, has this kind of pore structure and mechanical properties suitable for bone tissue, which has great potential in prolonging the service life of implants.
【作者單位】： 西北工業(yè)大學(xué)凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;西部超導(dǎo)材料科技股份有限公司;
【基金】：National Key Basic Research Development Program of China(“973”Program)(2012CB619101)
【分類號(hào)】：R318.08;TG146.23

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