造孔剂用量对新型医用多孔Ti-Mo-Ta-Nb-Zr合金组织与性能的影响  

Effect of Porogen Dosage on Morphology and Mechanical Property of New Biomedical Porous Ti-Mo-Ta-Nb-Zr Alloy

作　　者：张帅[1] 李伟[1] 马琳[1] 白娇娇[1] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025

出　　处：《有色金属工程》2015年第6期11-15,共5页Nonferrous Metals Engineering

基　　金：贵州大学引进人才科研项目(贵大人基合字(2012)029号)

摘　　要：采用添加造孔剂的粉末冶金方法制备新型医用多孔Ti-Mo-Ta-Nb-Zr合金,研究造孔剂用量对多孔材料组织形貌及压缩力学性能的影响。结果表明,多孔Ti-Mo-Ta-Nb-Zr合金孔隙率与造孔剂用量呈线性关系,P=1.9 Wt＋3.8（P为孔隙率,Wt为造孔剂用量）。当造孔剂用量达到15%时,孔隙率超过32%,并开始出现有利于体液传输的通孔结构,同时发现造孔剂用量不影响其所造孔隙大小形状。多孔Ti-Mo-Ta-Nb-Zr合金的相结构主要为β相和少量的α相。随着造孔剂用量增加β相分数有所减少,当造孔剂用量达到20%时,多孔钛合金中出现未知相。多孔Ti-Mo-Ta-Nb-Zr合金的压缩强度和压缩弹性模量均随造孔剂用量的增加而降低,造孔剂用量为15%~20%制备的多孔合金压缩强度为104~254 MPa,压缩弹性模量为2.33~6.14 GPa,与人体骨骼相接近,最适用作人体植入材料。New biomedical porous Ti-Mo-Ta-Nb-Zr alloy is prepared by the space-holder powder metallurgy process. The effects of porogen dosage on morphology and compressive mechanical properties of the alloy are investigated. The results show that the relationship of the alloy porosity and the porogen dosage is linear,it could be expressed as P = 1. 9 Wt ＋ 3. 8（ P means alloy porosity and Wt means porogen dosage）. When porogen dosage is 15%,the porosity will be over 32% and the through-hole structure will be formed in the alloy,it is favorable to fluid transmission. It is found meanwhile that there is no effect of the porogen dosage on the size and form of the pores. The phase composition of the porous Ti-Mo-Ta-Nb-Zr alloy is mainly β phase and a small amount of α phase. With the increase of porogen dosage,the β-phase fraction is decreased,and the unknown phase appears in the porous titanium alloy when porogen dosage is 20%. The compressive strength and compressive elastic modulus of the porous Ti-Mo-Ta-Nb-Zr alloy are decreased with the increase of porogen dosage. When the porogen dosage is15% ~ 20%,the compressive strength of the alloy is 104 ~ 254 MPa and compressive modulus is 2. 33 ~6. 14 GPa,and the porous titanium alloy is optimal as human implant material because of the property closing to the human skeleton.

关 键 词：多孔钛合金 造孔剂 组织形貌 力学性能 

分 类 号：TB39[一般工业技术—材料科学与工程] R318.08[医药卫生—生物医学工程]