Formation and wear behaviors of in-situ Al 3 Ti/Al composites using aluminum and titanium fibers under electromagnetic i
- PDF / 2,836,902 Bytes
- 9 Pages / 595.22 x 842 pts (A4) Page_size
- 54 Downloads / 215 Views
Formation and wear behaviors of in-situ Al3Ti/Al composites using aluminum and titanium fibers under electromagnetic induction heating MA Jun(马俊)1, NIU Li-bin(牛立斌)1, 2, WU Hong(武宏)2, GAO Chong(高冲)1, AN Yu-jiao(安玉姣)1 1. College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; 2. Shaanxi Key Laboratory of Nano-materials and Technology, Xi’an University of Architecture and Technology, Xi’an 710055, China © Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Under various electromagnetic induction heating powers, different Al3Ti/Al composites were fabricated by in-situ synthesis method from aluminum and titanium fibers. Microstructures and particles distribution of the composites were examined by XRD, SEM and EDS. The results show that no other intermetallic compounds beside Al3Ti can be in-situ synthesized. Around the titanium fibers, the reaction zones and diffusion zones can be obviously found. Due to the stirring of the electromagnetic function, the formation of the micro-cracks inside the reaction zone was conducive to the peeling off of the Al3Ti particles, and ensures the continuous reaction between liquid aluminum and titanium fibers, as well as the diffusion of Al3Ti particles. At the same time, there were secondary splits of Al3Ti particles located in diffusion zones. Two-body abrasion test shows that with the increase of induction heating power, the wear rates of the composites reduced and the number of grooves decreased. Key words: in-situ synthesis; induction heating; Al3Ti intermetallic; particle distribution; wear behaviors Cite this article as: MA Jun, NIU Li-bin, WU Hong, GAO Chong, AN Yu-jiao. Formation and wear behaviors of in-situ Al3Ti/Al composites using aluminum and titanium fibers under electromagnetic induction heating [J]. Journal of Central South University, 2020, 27. DOI: https://doi.org/10.1007/s11771-020-4500-1.
1 Introduction With low density, high hardness, good abrasion resistance and close coefficient of thermal expansion with the based metal [1, 2], the characteristics of transition-metal aluminide intermetallic has attracted great attention from researchers in the field of particle reinforced aluminum metal matrix composites (AMMCs) [3, 4]. Al3Ti intermetallic compound is considered to be good reinforcement in enhanced AMMCs attributed
to the low density of 3.3 g/cm3, high melting point (1348℃) and high elastic modulus (218 GPa) [5]. In the preparation of AMMCs, ex-situ particles with the serious surface contamination and the poor wettability with the matrix, even if the reinforcing particles are subjected carefully before addition, can not achieve satisfactory results [6]. Reinforcing phases prepared by in-situ synthesis have good wettability and thermodynamic stability with the alloy matrix, and the phenomenon of the poor bonding of the external particles was eliminated effectively [7].
Foundation item: Project(2015DFR50990-01) supported by International Cooperation Project
Data Loading...
