Study on the fabrication of in-situ TiB2/Al composite by electroslag melting

Abstract In-situ TiB2 particles can be synthesized via the salts-Al reaction by adding mixed K2TiF6 and KBF4 (Ti/B=1/2) salts into Al melt. In this research, a novel electroslag melting technology was proposed to synthesize TiB2 particles by the salts-Al reaction in order to reduce the reaction time period and purify the melt of composite. The effects of current of electroslag melting on the synthesis of TiB2 particles and mechanical properties of composite were investigated. The results showed that TiB2 particles could be in-situ synthesized by electroslag melting at 600 A for 15min. Compared with 60 min at 850°C of traditional LSM method, the efficiency of preparation was greatly improved. In addition, the dispersion of TiB2 particles in the composite prepared by electroslag melting was improved, meanwhile the non-metallic inclusions in the composite was reduced. The values of YS, UTS and El pct of composite prepared by electroslag melting were higher than that of the composite prepared by traditional LSM method.

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Effects of CeO2 additive on the microstructure and mechanical properties of in situ TiB2/Al composite

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2010.10.152 ◽

2011 ◽

Vol 509 (5) ◽

pp. 1573-1578 ◽

Cited By ~ 32

Author(s):

Jing Xue ◽

Jun Wang ◽

Yanfeng Han ◽

Pan Li ◽

Baode Sun

Keyword(s):

Mechanical Properties ◽

Microstructure And Mechanical Properties ◽

Al Composite

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Composite Zones Produced in Situ in the Ni3Al Phase

Archives of Foundry Engineering ◽

10.2478/afe-2013-0021 ◽

2013 ◽

Vol 13 (1) ◽

pp. 107-112

Author(s):

E. Olejnika ◽

A. Janas ◽

G. Sikora ◽

T. Tokarski ◽

J. Nowak

Keyword(s):

Mechanical Properties ◽

Volume Fraction ◽

Intermetallic Phase ◽

Lower Surface ◽

Smooth Control ◽

Ni3al Phase ◽

Al Composite ◽

Fraction Size ◽

Size And Morphology

Abstract The study presents the results of research on the development of composite zones in castings based on the intermetallic phase of Ni3Al. Composite zones were obtained by placing packets with substrates for the reaction of titanium carbide in a foundry mould. To provide a variable carbides content in the composite zone, two compositions of the packets were prepared. The first packet contained only substrates for the reaction of TiC synthesis; the second one also contained a filler. The resulting composite zones in castings were examined for the filler effect on changes in the volume fraction, size and morphology of carbides in the zone. In addition, the effect of filler on the mechanical properties of the zone was verified, observing changes of Vickers hardness in this area. It was found that the presence of filler in the composition of the packet for synthesis reduced the content of carbides, as well as their size and morphology. Lower surface content of carbides reduced hardness of the zone, which enabled smooth control of the mechanical properties. At the same time, the use of the selected filler did not disturb the course of the TiC carbide synthesis.

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Thermally stable microstructures and mechanical properties of B4C-Al composite with in-situ formed Mg(Al)B2

Journal of Material Science and Technology ◽

10.1016/j.jmst.2019.04.019 ◽

2019 ◽

Vol 35 (9) ◽

pp. 1825-1830 ◽

Cited By ~ 6

Author(s):

Yangtao Zhou ◽

Yuning Zan ◽

Shijian Zheng ◽

Xiaohong Shao ◽

Qianqian Jin ◽

...

Keyword(s):

Mechanical Properties ◽

Thermally Stable ◽

Al Composite ◽

Microstructures And Mechanical Properties

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Effect of ultrasonic stirring on the microstructure and mechanical properties of in situ Mg2Si/Al composite

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2016.04.077 ◽

2016 ◽

Vol 178 ◽

pp. 112-118 ◽

Cited By ~ 9

Author(s):

Jixing Lin ◽

Guangzhu Bai ◽

Zheng Liu ◽

Liyuan Niu ◽

Guangyu Li ◽

...

Keyword(s):

Mechanical Properties ◽

Microstructure And Mechanical Properties ◽

Al Composite ◽

Ultrasonic Stirring

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Dynamics of Nanoparticle Chain Aggregates of Carbon Under Tension

MRS Proceedings ◽

10.1557/proc-778-u4.4 ◽

2003 ◽

Vol 778 ◽

Author(s):

Rajdip Bandyopadhyaya ◽

Weizhi Rong ◽

Yong J. Suh ◽

Sheldon K. Friedlander

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Polymer Film ◽

Elastic Behavior ◽

Small Strains ◽

Transmission Electron ◽

Chain Aggregates ◽

Nanoparticle Chains ◽

Reinforcing Filler

AbstractCarbon black in the form of nanoparticle chains is used as a reinforcing filler in elastomers. However, the dynamics of the filler particles under tension and their role in the improvement of the mechanical properties of rubber are not well understood. We have studied experimentally the dynamics of isolated nanoparticle chain aggregates (NCAs) of carbon made by laser ablation, and also that of carbon black embedded in a polymer film. In situ studies of stretching and contraction of such chains in the transmission electron microscope (TEM) were conducted under different maximum values of strain. Stretching causes initially folded NCA to reorganize into a straight, taut configuration. Further stretching leads to either plastic deformation and breakage (at 37.4% strain) or to a partial elastic behavior of the chain at small strains (e.g. 2.3% strain). For all cases the chains were very flexible under tension. Similar reorientation and stretching was observed for carbon black chains embedded in a polymer film. Such flexible and elastic nature of NCAs point towards a possible mechanism of reinforcement of rubber by carbon black fillers.

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