Study on Ti fiber reinforced TiAl3 composite by infiltration-in situ reaction

Liu, Y. M.; Xiu, Ziyang; Wu, Guanglei; Yang, Wenshu; Chen, G. Q.; Gou, Hongye

doi:10.1007/s10853-009-3618-1

Cited by 25 publications

(7 citation statements)

References 20 publications

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“…TiAl 3 is the only intermetallic phase and no other titanium aluminides were found during annealing at 650 1C. It is in agreement with previous investigations that TiAl 3 is formed initially in Ti-Al system [24][25][26]. This is due to the minimum free energy of formation of the TiAl 3 among Ti 3 Al, TiAl and TiAl 3 compounds according to Peng's research [14].…”

Section: Characteristics Of Tial 3 Layerssupporting

confidence: 91%

Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Pang

Cui

et al. 2013

Materials Science and Engineering: A

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Section: Characteristics Of Tial 3 Layerssupporting

confidence: 91%

Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Pang

Cui

et al. 2013

Materials Science and Engineering: A

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“…This result could be attributed to the following reasons. Firstly, the [Ce] atoms generated by the reaction of CeO 2 with the Al melt are reacted with the TiAl 3 surfaces to form the Ti 2 Al 20 Ce core-shell structured rare earth phase, which has a better nucleation ability and inhibits the decomposition of TiAl 3 and the growth of crystal nuclei [ 22 ], thus increasing the number of effective nucleation phases. Secondly, the [Ce] atoms with strong chemical activity improve the wettability and dispersibility of TiC in Al melts.…”

Section: Resultsmentioning

confidence: 99%

“…The instability of TiAl 3 formed by the Al-Ti reaction (2) redissolves and generates [Ti] atoms at 1003 K [ 22 , 25 ]. These atoms then form Ti-rich zones around TiC and re-form thin layers of TiAl 3 on the dispersed TiC surface ( Figure 16 c), which promotes α-Al nucleation [ 7 , 8 , 9 , 10 ] ( Figure 16 d).…”

Section: Resultsmentioning

confidence: 99%

Effects of In-Situ Reaction, Extrusion Ratio and CeO2 on the Performance of Al-Ti-C-(Ce) Grain Refiners for Refining Pure Aluminum Grains

Luo

Guo

et al. 2023

Materials

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Al-Ti-C-(Ce) grain refiners were prepared by combining in-situ reaction, hot extrusion, and adding CeO2. The effects of second phase TiC particle size and distribution, extrusion ratio, and Ce addition on the grain-refining performance of grain refiners were investigated. The results show that about 10 nm TiC particles are dispersed on the surface and inside of 100–200 nm Ti particles by in-situ reaction. The Al-Ti-C grain refiners, which are made, by hot extrusion, of a mixture of in-situ reaction Ti/TiC composite powder and Al powder, increase the effective nucleation phase of α-Al and hinder grain growth due to the fine and dispersed TiC; this results in the average size of pure aluminum grains to decrease from 1912.4 μm to 504.8 μm (adding 1 wt.% Al-Ti-C grain refiner). Additionally, with the increase of the extrusion ratio from 13 to 30, the average size of pure aluminum grains decreases further to 470.8 μm. This is because the micropores in the matrix of grain refiners are reduced, and the nano-TiC aggregates are dispersed with the fragmentation of Ti particles, resulting in a sufficient Al-Ti reaction and an enhanced nucleation effect of nano-TiC. Furthermore, Al-Ti-C-Ce grain refiners were prepared by adding CeO2. Under the conditions of holding for 3–5 min and adding a 5.5 wt.% Al-Ti-C-Ce grain refiner, the average size of pure aluminum grains is reduced to 48.4–48.8 μm. The reason for the excellent grain-refining and good anti-fading performance of the Al-Ti-C-Ce grain refiner is presumedly related to the Ti2Al20Ce rare earth phases and [Ce] atoms, which hinder agglomeration, precipitation, and dissolution of the TiC and TiAl3 particles.

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“…However, these intermetallic compounds exhibit poor ductility and deformation capacity under a room-temperature condition, which restrict the value of engineering applications [ 4 , 5 ]. Given that, the composite molding technique was adopted to enhance the ductility of intermetallic compounds by introducing the reinforcement elements such as particles [ 6 ], fibers [ 7 ], ductile metal intergranular phases [ 8 ], and layers [ 9 , 10 , 11 ] into a brittle intermetallic matrix. In particular, through the bionic design, the metal-intermetallic laminated (MIL) composites were successfully fabricated.…”

Section: Introductionmentioning

confidence: 99%

“…Correspondingly, the geometry-based parameters include pre-stressing and post-stretching, the size effect of test specimens and impactor, geometry, and velocity. According to the research of many related articles [ 47 , 48 , 49 , 50 ], whether a CCFR-MIL composite undergoes aluminum or fiber damage is completely dependent on the layup configuration and aluminum constituents. Additionally, many research studies have been presented about Ti-base CCFR-MIL composite in recent years [ 51 , 52 , 53 , 54 , 55 ].…”

Section: Introductionmentioning

confidence: 99%

Elasto-Plastic Mechanical Properties and Failure Mechanism of Innovative Ti-(SiCf/Al3Ti) Laminated Composites for Sphere-Plane Contact at the Early Stage of Penetration Process

et al. 2018

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A novel silicon carbide (SiC) continuous ceramic fiber-reinforced (CCFR) Ti/Al3Ti Metal-Intermetallic-Laminate (MIL) composite was fabricated. A high-efficiency semi-analytical model was proposed based on the numerical equivalent inclusion method (NEIM) for analyzing the small-strain elasto-plastic contact in the early stage of the penetration process. The microstructure and interface features were characterized by the scanning electron microscopy (SEM). Quasi-static compression tests were performed to determine the contact response and validate the proposed model. A group of in-depth parametric studies were carried out to quantify the influence of the microstructure. The comparison between results under the sphere-plane and plane-plane contact load indicates that, under the first sphere-plane, the compressive strength and failure strain are both lower and the SiC reinforcement effect on strength is very clear while the effect on ductility is not clear. The maximum plastic strain concentration (MPSC) in the Al3Ti layer is closest to the upper boundary of the central SiC fiber and then extends along the depth direction as the load increases, which are also the locations where cracks may initiate and extend. Moreover, the CCFR-MIL composite shows better mechanical properties when the center distance between adjacent SiC fibers is four times the fiber diameter and the volume fraction of Ti is 40%.

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Study on Ti fiber reinforced TiAl3 composite by infiltration-in situ reaction

Cited by 25 publications

References 20 publications

Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Effect of solid solution of Si on mechanical properties of TiAl3 based on the multi-laminated Ti-(SiCP/Al) composite system

Effects of In-Situ Reaction, Extrusion Ratio and CeO2 on the Performance of Al-Ti-C-(Ce) Grain Refiners for Refining Pure Aluminum Grains

Elasto-Plastic Mechanical Properties and Failure Mechanism of Innovative Ti-(SiCf/Al3Ti) Laminated Composites for Sphere-Plane Contact at the Early Stage of Penetration Process

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