Abstract
In this study, an Al matrix composite reinforced with both ex-situ and in-situ γ-Al2O3 particles was prepared through the liquid-solid reaction. Most of the in-situ γ-Al2O3 particles distribute along grain boundaries, while the ex-situ γ-Al2O3 particles were simultaneously coated by in-situ γ-Al2O3 with a thickness of several nanometers. This coating structure is supposed beneficial for enhancing the bonding strength between ex-situ γ-Al2O3 and the Al matrix. The ultimate tensile strength of the composite is tested to be 362 MPa at room temperature, while the strength can still be high to 205 MPa at 350 °C. This study sheds new insights to resolve the problem between ex-situ particles and the matrix in metal matrix composites.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
