Property-microstructure correlation in in situ formed Al2O3, TiB2 and Al3Ti mixture-reinforced aluminium composites

Y., Z.; Li, J. H.; Li, S. X.; Ning, Xiaojuan; Lu, Ying; Bi, Jing

doi:10.1007/bf00367894

Cited by 40 publications

(9 citation statements)

References 11 publications

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“…[24] Compared to the conventional TiB 2 /Al composite, the in situ TiB 2 /Al composite exhibited much higher strength and modulus, [23] as well as significant improvement in creep resistance. [24] Recently, Ma and co-workers [25,26,27] reported preliminary results on the in situ fabrication of the aluminum matrix composites using Ti-Al-B and TiO 2 -Al-B. They reported that in situ TiB 2 particles are very effective in strengthening aluminum.…”

Section: Introductionmentioning

confidence: 97%

In Situ ceramic particle-reinforced aluminum matrix composites fabricated by reaction pressing in the TiO2 (Ti)-Al-B (B2O3) systems

Tjong

1997

Metall Mater Trans A

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100

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Particulate TiB 2 reinforced aluminum-based metal matrix composites (MMCs) were successfully fabricated by means of the reaction processing method. TiB 2 particulates were formed in situ through the reaction of Ti and B in systems. The results showed that in situ TiB 2 particulates formed in the Ti-Al-B system had a size of 5 m and they exhibited block and rodlike structures. Moreover, coarse Al 3 Ti blocks several tens of micrometers in size were also formed simultaneously. On the other hand, equiaxed Al 2 O 3 and TiB 2 particulates with a size of less than 2 m were formed in situ in the TiO 2 -Al-B and TiO 2 -Al-B 2 O 3 systems. The Al 3 Ti phase was completely eliminated in the TiO 2 -Al-B system with increasing B content. Tensile tests revealed that the Al 2 O 3 ⅐ TiB 2 /Al composite fabricated from the TiO 2 -Al-B system exhibits excellent mechanical properties. The yield strength of the Al 2 O 3 ⅐ TiB 2 /Al composite appeared to increase with increasing TiB 2 content. The yield strength of the Al 2 O 3 ⅐ TiB 2 /Al composite could be further increased by introducing CuO into the TiO 2 -Al-B system. Such an increment in mechanical strength arose from the strengthening effect caused by the Al 2 Cu precipitates. The incorporation of CuO had no effect on the in situ reaction process of the TiO 2 -Al-B system. Finally, the effect of SiC addition on the microstructure and mechanical properties of the composites fabricated from the TiO 2 -Al-B and TiO 2 -Al-B-CuO systems was also investigated.

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Section: Introductionmentioning

confidence: 97%

In Situ ceramic particle-reinforced aluminum matrix composites fabricated by reaction pressing in the TiO2 (Ti)-Al-B (B2O3) systems

Tjong

1997

Metall Mater Trans A

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100

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“…[1][2][3][4] Due to their specific mechanical and thermal properties such as high melting temperature, high strength, wear resistance, and low thermal expansion, ceramic reinforcements such as SiC, Al 2 O 3 , TiC, etc., have long been synthesized at a large scale as reinforcements for AMCs. [5][6][7][8] However, during synthesis reactions, unwanted extremely brittle phases such as Al 3 Ti and Al 4 C 3 can be produced and deteriorate the mechanical properties of AMCs. 7,9 Moreover, Al 4 C 3 can lower the fatigue resistance and thermal stability of the SiC/Al composites.…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8] However, during synthesis reactions, unwanted extremely brittle phases such as Al 3 Ti and Al 4 C 3 can be produced and deteriorate the mechanical properties of AMCs. 7,9 Moreover, Al 4 C 3 can lower the fatigue resistance and thermal stability of the SiC/Al composites. Also, Al 4 C 3 is prone to react with water, thereby causing corrosion in the composite via the following reaction:…”

Section: Introductionmentioning

confidence: 99%

In Situ Al Based Composites Fabricated in Al-SiO2-C System by Reaction Sintering

Mokhnache

Wang

et al. 2015

JOM

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In situ Al-based composites with different SiO 2 /C/Al molar ratios were fabricated by reaction hot pressing. Differential scanning calorimetry (DSC) was used to investigate the reaction mechanisms in the Al-SiO 2 -C system. X-ray diffraction results revealed that no new resultant phase was observed below the melting temperature of aluminum except the SiO 2 , C and Al phases. Heating at different synthesis temperatures showed that, up to 1000°C with a holding time of 1 h, the reactions in the Al-SiO 2 -C system took place completely, where the final products were Al 2 O 3 , SiC, Al 4 C 3 and Si. Microstructural observation showed that the in situ synthesized Al 2 O 3 , SiC, Al 4 C 3 , and Si were dispersed uniformly and had fine sizes less than 2 lm. The formed interfaces between the reinforcements and Al matrix are clean and free from any interfacial phase. During cooling, the synthesized Si formed a multilayer growth in the (111) direction. When the SiO 2 /C/Al molar ratio was (6/3/9), more Al 2 O 3 and Si were produced along with the complete prevention of Al 4 C 3 in the Al-SiO 2 -C system. The yield strength, ultimate tensile strength and Brinell hardness of the in situ fabricated composites are significantly higher than those of pure aluminum matrix, with a decrease of ductility. Mechanisms governing the tensile fracture process are also discussed.

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“…By adjusting the ratio of Al to TiO 2 , Albased MMCs and alumina-titanium aluminide (TiAl and/or Ti 3 Al) intermetallic matrix composites with interpenetrating networks can be synthesized from Al-TiO 2 powder mixtures via reactive sintering, SHS or reactive infiltration of molten Al into porous performs [4][5][6]. Regarding Al-based MMCs achieved by aluminothermic reactions between Al and TiO 2 , in addition to Al 2 O 3 reinforcing particulates, an intermetallic compound Al 3 Ti with tetragonal structure and platelet morphology often appears [7]. To overcome the harmful influence of Al 3 Ti on strength and ductility of the composites, boron has been tried to incorporate into Al-TiO 2 system [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding Al-based MMCs achieved by aluminothermic reactions between Al and TiO 2 , in addition to Al 2 O 3 reinforcing particulates, an intermetallic compound Al 3 Ti with tetragonal structure and platelet morphology often appears [7]. To overcome the harmful influence of Al 3 Ti on strength and ductility of the composites, boron has been tried to incorporate into Al-TiO 2 system [7][8][9][10][11]. In Al-B-TiO 2 ternary system, not only Al 3 Ti blocks are refined and disappear gradually, but also fine TiB 2 particulates can be formed, thus further improving the mechanical properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution of reactive-sintered aluminum matrix composites

Chen

Takeda

Ikeda

2008

Composites Science and Technology

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Property-microstructure correlation in in situ formed Al2O3, TiB2 and Al3Ti mixture-reinforced aluminium composites

Cited by 40 publications

References 11 publications

In Situ ceramic particle-reinforced aluminum matrix composites fabricated by reaction pressing in the TiO2 (Ti)-Al-B (B2O3) systems

In Situ ceramic particle-reinforced aluminum matrix composites fabricated by reaction pressing in the TiO2 (Ti)-Al-B (B2O3) systems

In Situ Al Based Composites Fabricated in Al-SiO2-C System by Reaction Sintering

Microstructural evolution of reactive-sintered aluminum matrix composites

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