纳米CeO2/Zn-4.5Al-RE复合材料的力学性能及表观粘度
Mechanical Properties and Apparent Viscosity of Nano-CeO2/Zn-4.5Al-RE Composites
摘 要
测试了不同增强颗粒质量分数的纳米CeO2/Zn-4.5Al-RE复合材料的力学性能,测定了柱形试样熔化前后的高度变化率,讨论了复合材料的表观粘度,并研究了纳米CeO2含量对两者的影响规律.结果表明:CeO2的加入提高了基体的力学性能,当其含量为3%时,复合材料的维氏硬度、弹性模量和抗拉强度分别达到96.7 HV,17.1 GPa和176.5 MPa,较基体分别提高了41.2%,34.6%和34.2%,而伸长率则降低了4.6%;随着CeO2含量的增加,复合材料的高度变化率ΔH/H0大大降低,粘度急剧增大.
纳米CeO2
表观粘度
metal matrix composite
nano-CeO2 particle
apparent viscosity
Abstract
The mechanical properties of nano-CeO2/Zn-4.5Al-RE composites with different weight fractions of CeO2 were measured with a universal tester.And the apparent viscosity was investigated by means of the height decreasing rate of composite before and after remelting.The effects of nano-CeO2 on mechanical properties and apparent viscosity were analyzed.The mechanical properties of matrix increase with the addition of CeO2.Compared with matrix alloy,the mechanical properties of composites are optimal at the CeO2 weight fraction of 3%.With the values of the HV hardness,modulus and tensile strength being 96.7 HV,17.1 GPa and 176.5 MPa,increased by 412%,34.6% and 34.2% respectively.However,the elongation ratio of composites decreasesed by 4.6%.The apparent viscosity of composites rapidly increases with increasing content of CeO2.
中图分类号 TB331
所属栏目
基金项目 江苏省高新技术产业化资助项目(JH01-071)
收稿日期 2006/9/11
修改稿日期 2006/12/6
网络出版日期
作者单位点击查看
备注杜占斌(1974-),男,山东菏泽人,硕士研究生.
引用该论文: DU Zhan-bin,LI Zi-quan,ZHOU Heng-zhi,YANG Ji-nian. Mechanical Properties and Apparent Viscosity of Nano-CeO2/Zn-4.5Al-RE Composites[J]. Materials for mechancial engineering, 2007, 31(7): 69～72
杜占斌,李子全,周衡志,杨继年. 纳米CeO2/Zn-4.5Al-RE复合材料的力学性能及表观粘度[J]. 机械工程材料, 2007, 31(7): 69～72
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【5】Luo B H,Bai Z H,Xie Y Q.The effects of trace Sc and Zr on microstrcture and internal friction of Zn-Al eutectoid alloy[J].Materials Science and Engineering A,2004,370:172-176.
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【7】王旭东,周伟峰,孙东柏.SiC纳米粒子增强锌基耐蚀涂层的制备及性能研究[J].现代表面技术研究与应用,2005(10):54-55.
【8】何建平,骆心怡,李顺林.纳米氧化铈微粒对锌镀层结构和耐蚀性能的影响[J].稀土,2003,24(1):24-27.
【9】唐建平.热镀锌钢丝锌层面质量的研究[J].金属制品,2005,31(3):13-14.
【10】Wang J,Guo Q X,Nishio M,et al.The apparent viscosity of fine particle reinforced composite melt[J].Journal of Materials Processing Technology,2003,136:60-63.
【11】Han Yanfeng,Li Ke,Wang Jun,et al.Influence of high-intensity ultrasound on grain refining performance of Al-5Ti-1B master alloy on aluminium[J].Materials Science and Engineering A,2005,405:306-312.
【12】王朝辉,康永林,赵鸿金,等.纳米SiC颗粒增强AM60镁合金组织性能的研究[J].特种铸造及有色合金,2005,25(11)641-642.
【13】姚义俊,丘泰,沈春英,等.改性氧化铝黑瓷粉体制备高固相含量浆料的研究[J].真空电子技术,2005(4):30-33.
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