The superior elevated-temperature mechanical properties of Al-Cu-Mg-Si composites reinforced with in situ hybrid-sized TiCx-TiB2 particles

In this paper, Ti-1100 composites reinforced with TiB+TiC ceramic particles were fabricated using in situ technologies. Mechanical properties of the composites with different volume fractions of TiB and TiC reinforcements were evaluated by tensile tests at 873K. The breakage of TiB was observed during the failure process of the composite. Strengthening efficiencies of the reinforcements for different composites were calculated. The strengthening mechanisms in this composite during tensile tests were discussed. It was suggested that the effect of the solution of C, which was produced in the preparation process, also can not be ignored for such a composite.

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In-Situ SEM Study of Mechanical Properties of Aluminide Bond Coating at Elevated Temperature

Microscopy and Microanalysis ◽

10.1017/s1431927616009545 ◽

2016 ◽

Vol 22 (S3) ◽

pp. 1740-1741 ◽

Cited By ~ 5

Author(s):

Sanjit Bhowmick ◽

Zafir Alam ◽

S. A. Syed Asif

Keyword(s):

Mechanical Properties ◽

Elevated Temperature ◽

Bond Coating ◽

Sem Study

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Microstructure, mechanical properties and strengthening mechanisms of Mg matrix composites reinforced with in situ nanosized TiB2 particles

Materials Science and Engineering A ◽

10.1016/j.msea.2017.10.107 ◽

2018 ◽

Vol 710 ◽

pp. 251-259 ◽

Cited By ~ 39

Author(s):

Peng Xiao ◽

Yimin Gao ◽

Cuicui Yang ◽

Zhiwei Liu ◽

Yefei Li ◽

...

Keyword(s):

Mechanical Properties ◽

Matrix Composites ◽

Strengthening Mechanisms ◽

Tib2 Particles

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Microstructure Formation Mechanism of (Al2O3+TiB2+Al3Ti)/Al Composites Fabricated by Reactive Hot Pressing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.353-358.1439 ◽

2007 ◽

Vol 353-358 ◽

pp. 1439-1442 ◽

Cited By ~ 1

Author(s):

Gui Song Wang ◽

Lin Geng

Keyword(s):

Mechanical Properties ◽

Young’S Modulus ◽

Formation Mechanism ◽

Hot Pressing ◽

Young's Modulus ◽

Microstructure Formation ◽

Sem And Tem ◽

Reactive Hot Pressing ◽

Tib2 Particles

The two (Al2O3+TiB2+Al3Ti)/Al composites were fabricated from Al-B2O3-TiO2 and Al-B-TiO2 raw powders by reactive hot pressing, respectively. The microstructure of in situ two composites was analyzed by OM, SEM and TEM. The results showed that coarse Al3Ti blocks with several tens of micrometers size were formed during hot pressing. The equiaxed Al2O3 particulates and hexagonal TiB2 particulates with finer sizes were formed in the composites simultaneously. The microstructure formation mechanism of (Al2O3+TiB2+Al3Ti)/Al composites were discussed. The results showed that Al2O3 reinforcements were formed on the surface of TiO2 or B2O3 powder and TiB2 particles were formed on B or B2O3 powders. The formation of coarse Al3Ti block is result from continuous diffusion of Ti in liquid Al during reactive hot pressing. In addition, there are fine Al3Ti precipitates exist in the composite fabricated from Al-B-TiO2 powders. This contributes to the improved mechanical properties in terms of yield and ultimate stresses and Young’s modulus of the composite.

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