The present work aims to reveal the dispersoids evolution and valuable role of Zr on elevated-temperature creep resistance Al–7Si-0.3Mg alloy. At 300°C 25 MPa, Al–7Si-0.3Mg-0.15Zr alloy exhibits more than double decrement in minimum rate, 263 h increment time-to-fracture compared Zr-free cast These effects were owe formation novel nanobelt-like Si2Zr rectangle-like (Al, Si)3–Zr during solutioni...