作　　者： (赵雅君）; (曹小建）; (金江）; (丁华建）;

机构地区： 内蒙古大学生命科学学院,内蒙古呼和浩特010021

出　　处： 《南通大学学报（自然科学版）》 2017年第2期31-35,共5页

摘　　要： 分别在静荷载25 N、振幅30μm、冲击数36 000次/mm2的条件下对TC4钛合金进行超声表面冲击强化(UNSM)处理、采用传统喷丸技术(硬度45~50 HRC且直径1 mm的钢丸,阿尔门强度0.10~0.15 mm A,覆盖率100%)对TC4进行喷丸处理,然后对比研究两种工艺对TC4生物相容性的影响,包括体液腐蚀行为、表面钙磷的矿化沉积及纤维软骨细胞早期黏附行为,并对处理后TC4钛合金的表面形貌、极化曲线、腐蚀形貌、细胞黏附等进行分析.结果表明:超声冲击可让TC4维持较好的平整度,而喷丸使材料表面粗糙度明显增加;UNSM处理和喷丸处理均在TC4表面产生点腐蚀坑,UNSM处理后的表面点腐蚀坑最多,而喷丸处理后TC4的耐体液腐蚀性能最差;两种表面处理均可增强TC4表面钙磷元素的沉积,且两种表面处理均可增进纤维软骨细胞的早期黏附,UNSM作用更佳. The effect of ultrasonic nanocrystal surface modification （UNSM） and shot peening （SP） on the biocom- patibility of TC4 was investigated, including the corrosion behavior in simulated body fluid （SBF）, the deposition of calcium and phosphorus, and the earlier adhension of fibrochondrocyte. UNSM was carded out with the condition of a static load of 25 N, vibration amplitude of 30 ixm and 36 000 strikes per unit. TC4 specimens were treated using con- ventional shot peening（steel balls of 1.0 mm in diameter, hardness of 45~50 HRC） leading to an Almen intensity （French standard AFNOR NFL 06832） of 0.10 ~ 0.15 mmA. The overlapping rate was 100%. The surface topogra- phy, polarisation curve, corrosion feature, and the adhension of fibrochondrocyte were studied. Findings showed that： UNSM maintains the good surface, while shot peening increases the surface roughness;Etch pits are exist on both the UNSMed and SPed surface, UNSM makes the most etch pits, but the corrosion property of shot peening is the worst; The deposition of calcium and phosphorus is enhanced after both the two treatments; They also improve the earlier ad- hension of fibrochondrocyte, UNSM can achieve a better result.

关 键 词： 超声冲击 喷丸 钛合金 生物相容性 钙磷沉积 纤维软骨细胞