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| 1 | Evaluating and Modeling the Mechanical Properties of the Prepared PLGA/nano-BCP Composite Scaffolds for Bone Tissue Engineering显示文摘In this paper, preparation of nano-biphasic calcium phosphate (nBCP), mechanical behavior and load-bearing of poly (lactide-co-glycolide) (PLGA) and PLGA/nBCP are presented. The nBCP with composition of 63/37 (w/w) HA/β-TCP (hydroxyapatite/β-tricalcium phosphate) was produced by heating of bovine bone at 700℃. Composite scaffolds were made by using PLGA matrix and 10-50 wt% nBCP powders as reinforcement material. All scaffolds were prepared by thermally induced solid-liquid phase separation (TIPS) at -60℃ under 4 Pa (0.04 mbar) vacuum. The results of elastic modulus testing were adjusted with Ishai-Cohen and Narkis models for rigid polymeric matrix and compared to each other. PLGA/nBCP scaffolds with 30 wt% nBCP showed the highest value of yield strength among the scaffolds. In addition, it was found that by increasing the nBCP in scaffolds to 50 wt%, the modulus of elasticity was highly enhanced. However, the optimum value of yield strength was obtained at 30 wt% nBCP, and the agglomeration of reinforcing particles at higher percentages caused a reduction in yield strength. It is clear that the elastic modulus of matrix has the significant role in elastic modulus of scaffolds, as also the size of the filler particles in the matrix. | M. Ebrahimian-Hosseinabadi F. Ashrafizadeh M. Etemadifar Subbu S. Venkatraman | 2011 | Journal of Materials Science & Technology2011，27，12： | 3 |
| 2 | TiO_(2)纳米颗粒对7075铝合金表面等离子体电解氧化涂层性能的影响显示文摘采用等离子体电解氧化(PEO)技术,利用单极脉冲波形在含有胶体TiO_(2)纳米颗粒的溶胶电解液中制备Al_(2)O_(3)−TiO_(2)复合涂层。溶胶溶液是将1、3和5 g/L的草酸钛酸钾(PTO)溶解在硅酸盐溶液中制得。利用扫描电镜、能量色散光谱、X射线衍射和拉曼光谱对涂层进行表征。采用极化和阻抗技术研究涂层的腐蚀行为。结果表明,TiO_(2)通过微放电方式进入涂层,并掺杂到氧化铝相中。TiO_(2)掺入量较高时,表面微孔减少;反之,掺入量较低时则微孔增多。TiO_(2)含量越高,涂层的外层越致密,内层越厚。电化学测试结果表明,与在不含PTO溶液中制备的涂层相比,在含3 g/L PTO溶液中制备的涂层腐蚀性能得到大幅提高。在不含PTO溶液中制备的涂层含有γ-Al_(2)O_(3),δ-Al_(2)O_(3)和非晶相,而PTO的存在促进α-Al_(2)O_(3)的生成。 | Mehri HASHEMZADEH Keyvan RAEISSI Fakhreddin ASHRAFIZADEH Amin HAKIMIZAD Monica SANTAMARIA | 2021 | Transactions of Nonferrous Metals Society of China2021，31，12： | 2 |
| 3 | Emulsification of heavy crude oil in water by natural surfactants显示文摘 | S.N. Ashrafizadeh E. Motaee V. Hoshyargar | 2012 | Journal of Petroleum Science and Engineering2012，，： | 2 |
| 4 | Emulsification of heavy crude oil in water for pipeline transportation显示文摘 | Ashrafizadeh S N Kamran M | 2010 | Journal of Petroleum Science and Engineering2010，71，34： | 1 |
| 5 | Ammonia Removal from Aqueous Solutions by Iranian Natural Zeolite显示文摘 | S. N. Ashrafizadeh Z. Khorasani M. Gorjiara | 2008 | Separation Science and Technology2008，，4： | 1 |
| 6 | Determination of optimum process conditions for the extraction and separation of zirconium and hafinium by solvent extraction显示文摘 | Taghizadeh M Ghasemzadeh R Ashrafizadeh S N | 2008 | Hydrometallurgy2008，90，2： | 1 |
| 7 | Influence of processing parameters on grinding mechanism in planetary mill by employing discrete element method显示文摘 | Hossein Ashrafizadeh Mahmud Ashrafizaadeh | 2012 | Advanced Powder Technology2012，，6： | 1 |
| 8 | Improving the tribological behavior of copper through novel Ti-Cu intermetallic coatings显示文摘 | BATENI M R ASHRAFIZADEH F SZPUNAR J A DREW R A L | 2002 | Wear2002，253，56： | 1 |
| 9 | Effects of ARB and ageing processes on mechanical properties and microstructure of 6061 aluminum alloy显示文摘 | Rezaei M R Toroghinejad M R Ashrafizadeh F | | 0，，： | 1 |
| 10 | Oxidation behaviour of titanium coated substrate 显示文摘 | BATENI M R MIRDAMADI S ASHRAFIZADEH F | 2001 | Surface and Coatings Technology2001，139，23： | 1 |
| 11 | Oxidation behaviour of titanium coated substrate 显示文摘 | Bateni S M R Mirdamadi F Ashrafizadeh J A | 2001 | Surface and Coatings Technology2001，139，23： | 1 |
| 12 | Oxidation behaviour of titanium coated substrate 显示文摘 | BATENI M R MIRDAMADI S ASHRAFIZADEH F | 2001 | Surface and Coatings Technology2001，139，23： | 1 |
| 13 | Development of a new ultrafine grained dual phase steel and examination of the effect of grain size on tensile deformation behavior显示文摘 | N. Saeidi F. Ashrafizadeh B. Niroumand | 2014 | Materials Science & Engineering A2014，，： | 1 |
| 14 | Improving the tribological behavior of copper through novel Ti-Cu intemaetallic coatings显示文摘 | Bateni M R Ashrafizadeh F Szpunar J A | 2002 | Wear2002，253，56： | 1 |
| 15 | Effect of microstructure and texture on formability and mechanical properties of hot-dip galvanized steel sheets 显示文摘 | Safaeirad M Toroghinejad M R Ashrafizadeh F | 2008 | Journal of Materials Processing Technology2008，196，： | 1 |
| 16 | Improving the tribological behavior of copper through novel TiCu intermetallic coatings显示文摘 | BATENI M R ASHRAFIZADEH F SZPUNAR J A | 2002 | Wear2002，253，56： | 1 |
| 17 | Characterization of boride-rich hardfacing on carbon steel by arc spray and GMAW processes显示文摘 | Amushahi M H Ashrafizadeh F Shamanian M | | 0，，204： | 1 |
| 18 | Effects of ARB and ageing processes on mechanical properties and microstructure of 6061 aluminum alloy显示文摘 | Mohammad Reza Rezaei Mohammad Reza Toroghinejad Fakhreddin Ashrafizadeh | 2011 | Journal of Materials Processing Tech2011，，6： | 1 |
| 19 | Optimi- zation of Pulsed TIG Cladding Process of Stellite Alloy on Carbon Steel Using RSM 显示文摘 | MADADI F ASHRAFIZADEH F SHAMANIAN M | 2012 | Journal of Alloys and Com- pounds2012，510，1： | 1 |
| 20 | Microstructure and wear behavior of stellite 6 cladding on 17-4PH stainless steel显示文摘 | GHOLIPOUR A SHAMAN1AN M ASHRAFIZADEH F | 2011 | Journal of Alloys and Compounds2011，509，： | 1 |
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