冷喷摩擦复合增材制造制备ZrO_(2)颗粒增强钛基复合材料组织与磨损性能  

Microstructure and tribological properties of ZrO_(2)particles reinforced titanium matrix composites prepared via cold spray-friction composite additive manufacturing

作　　者：王俣豪 乔柯[1,2] 张兵 王快社[1,2] 王文 孙琦[1] WANG Yu-hao;QIAO Ke;ZHANG Bing;WANG Kuai-she;WANG Wen;SUN Qi(School of Metallurgical Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China;National and Local Joint Engineering Research Center for Functional Materials Processing,Xi′an 710055,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]功能材料加工国家地方联合工程研究中心,陕西西安710055

出　　处：《塑性工程学报》2024年第2期105-112,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金重点项目(52034005);国家自然科学基金面上资助项目(51974220);国家自然科学基金青年资助项目(52104383);陕西省教育厅青年创新团队建设项目(21JP058);陕西省教育厅专项科研项目(17JK0430)。

摘　　要：采用冷喷涂增材制造和冷喷摩擦复合增材制造技术制备了ZrO_(2)颗粒增强钛基复合材料,使用SEM和EBSD等表征了微观组织特征,研究了模拟体液环境下的磨损性能和磨损机制。结果表明:相较于冷喷涂增材制造试样,冷喷摩擦复合增材制造试样中孔洞缺陷消失,组织明显致密化,ZrO_(2)均匀分布于Ti基体中,试样的致密度达99.1%。冷喷摩擦复合增材制造过程中发生了连续动态再结晶,平均晶粒尺寸均匀化至2.5μm。相较冷喷涂增材制造试样,冷喷摩擦复合增材制造试样显微硬度显著提升(由221 HV 0.2提升至544 HV 0.2)。在模拟体液环境下,冷喷摩擦复合增材制造试样具有较低的磨损率(1.09×10^(-3)mm^(3)·N^(-1)·m^(-1)),表现出较好的耐磨性。磨粒磨损和粘着磨损是冷喷涂增材制造试样的主要磨损机制,而磨粒磨损是冷喷摩擦复合增材制造试样的主要磨损机制。ZrO_(2)particle reinforced titanium matrix composites were prepared by cold spray additive manufacturing(CSAM)and cold spray-friction composite additive manufacturing(CFAM).The microstructure was characterized by SEM and EBSD,and the tribological properties and tribological mechanism in simulated body fluid(SBF)environment were investigated.The results show that compared with the CSAM sample,the hole defects in CFAM sample disappear and the microstructure is significantly densified.ZrO_(2)is uniformly distributed in Ti matrix,and the densities of the sample reach 99.1%.Continuous dynamic recrystallization occurs during CFAM and the average grain size is homogenized to 2.5μm.Compare with the CSAM sample,the CFAM sample shows a significant increase in microhardness(from 221 HV 0.2 to 544 HV 0.2).The CFAM sample has the lower wear rate(1.09×10^(-3)mm^(3)·N^(-1)·m^(-1))and exhibits better wear resistance property in simulated body fluid environment.Abrasive wear and adhesive wear are the main tribological mechanisms of CSAM sample,while abrasive wear is the main tribological mechanism of CFAM sample.

关 键 词：冷喷涂 搅拌摩擦加工 钛基复合材料 微观组织 磨损性能 

分 类 号：TG306[金属学及工艺—金属压力加工]