轻质高强复合材料可耐500℃高温

Core Viewpoint - A research team from the University of Toronto has developed a new composite material that maintains lightweight and high strength characteristics at high temperatures (up to 500°C), showing potential applications in the aerospace industry [1]. Group 1: Material Characteristics - The new material utilizes a titanium alloy mesh structure as a "reinforcement skeleton" and is filled with an aluminum-silicon-magnesium alloy as a "cement matrix" through micro-casting technology, incorporating nano-scale precipitated particles for enhanced performance [1]. - Compared to traditional aluminum alloys, which soften at high temperatures (with a strength of only about 5 MPa at 500°C), the new material exhibits impressive performance, maintaining a strength of 300-400 MPa at 500°C, comparable to mid-grade steel, while being two-thirds lighter [1]. - The yield strength of the new material reaches 700 MPa at room temperature, indicating its robustness under stress [1]. Group 2: Technological Innovation - The research team employed computer simulations to discover that the new material maintains its strength at high temperatures through a unique deformation mechanism known as "enhanced twinning" [1]. - This breakthrough highlights the innovative potential of additive manufacturing technology, paving the way for the development of lighter, stronger, and more energy-efficient transportation tools [1].