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限空間自蔓延法制備多孔NiTi合金及性能表征
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1.廣東省材料與加工研究所;2.中南大學(xué)

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中圖分類號(hào):

TB383

基金項(xiàng)目:

國家自然科學(xué)基金（51404077）；廣東省自然科學(xué)基金(2015A030313775)；廣東省科學(xué)院實(shí)施創(chuàng)新驅(qū)動(dòng)發(fā)展能力建設(shè)專項(xiàng)(2019GDASYL-0402006、2018GDASCX-0117)；廣東省公益研究與能力建設(shè)項(xiàng)目(2017A070701029)；廣東省重點(diǎn)領(lǐng)域研發(fā)計(jì)劃項(xiàng)目(2018B090904004)；廣州市科技計(jì)劃項(xiàng)目(ZWY201704003、201508030032)


Preparation and Performance Characterization of Porous NiTi Alloys by Space-controlled Self-propagating Method
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    摘要:

    以Ti粉和Ni粉為原料，對粉末進(jìn)行預(yù)處理后，采用限空間自蔓延工藝制備多孔NiTi合金，對合金的孔隙結(jié)構(gòu)、物相和超彈性等性能進(jìn)行表征，進(jìn)一步通過體外細(xì)胞毒性試驗(yàn)(MTT法)評價(jià)合金的生物安全性能。結(jié)果表明：粉末未進(jìn)行預(yù)處理時(shí)，難以獲得孔隙結(jié)構(gòu)理想的多孔合金。對粉末進(jìn)行適當(dāng)?shù)念A(yù)處理后，可以獲得綜合性能優(yōu)異的多孔NiTi合金。合金中的孔隙分布均勻，孔隙形狀近球形，孔隙率為34%，孔徑為100-500 μm。合金物相由單一的B2相組成，具有良好的超彈性，在2.5%應(yīng)變和4.0%應(yīng)變下經(jīng)過3次循環(huán)加載-卸載壓縮測試，未產(chǎn)生殘余應(yīng)變。兩種應(yīng)變時(shí)對應(yīng)的抗壓強(qiáng)度分別為250 MP和363 MPa，彈性模量為15.4 GPa。MTT試驗(yàn)顯示細(xì)胞形態(tài)體征正常，細(xì)胞毒性為1級，表明制備的多孔NiTi合金具有良好的生物安全性能。

    Abstract:

    A new designed space-controlled self-propagating synthesis process was used to prepare porous NiTi shape memory alloys (SMAs) after the pretreatment of Ti powder and Ni powder. Properties including pore structures, phase composition and superelasticity of the alloys are characterized, and the biological safety was evaluated through the experiment mcludmg hemolysls test and cytotoxicity test (MTT). The results show that it is difficult to obtain SMAs with ideal pore structures without pretreating the mixed powders. After pretreating the raw powders properly, SMAs with excellent comprehensive properties can be fabricated. Nearly spherical pores with 34% porosity and diameters between 100 and 500 μm are homogeneously distributed in the alloys. The alloys are composed of single B2 and have good superelasticity. After three cyclic loading and unloading compression tests at 2.5% and 4.0% strains, no residual strain is generated. The corresponding compressive strength is 250MP and 363MPa respectively, and the elastic modulus is 15.4GPa. MTT tests show morphologies of cells in SMAs leaching solution are normal and the cytotoxicity is estimated level 1, indicating SMAs have good biological safety.

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引用本文

陳峰,閆志巧,施麒,劉詠,劉彬.限空間自蔓延法制備多孔NiTi合金及性能表征[J].稀有金屬材料與工程,2020,49(3):1009~1014.[Chen Feng, Yan Zhi Qiao, Shi Qi, Liu Yong, Liu Bin. Preparation and Performance Characterization of Porous NiTi Alloys by Space-controlled Self-propagating Method[J]. Rare Metal Materials and Engineering,2020,49(3):1009~1014.]
DOI：10.12442/j. issn.1002-185X.17Ti2019128

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  • 收稿日期:2019-05-22
  • 最后修改日期:2019-07-03
  • 錄用日期:2019-07-30
  • 在線發(fā)布日期: 2020-04-08
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