High-temperature mechanics properties of in situ TiB2p reinforced Al–Si alloy composites

The eutectic Al–Si alloy composites reinforced with sub-micron TiB2 particles were successfully fabricated by means of reaction processing method. The TiB2 particles were formed in situ through the reaction of Ti and B bearing salts and Al alloy. The test results showed that the ultimate tensile strength of the composites were higher than that of Al–Si master alloy at the temperature ranging from 25 to 400 °C, and the contribution ratio of the particles to the ultimate tensile strength reached its peak value at 260 °C, and the mechanism is also discussed in this essay.