super-hard aluminum alloys

例句：

1. 1. The super-hard aluminum alloy is used in the production of aircraft engines.
   这种超级硬铝合金用于生产飞机发动机。
2. 2.The super-hard aluminum alloy has excellent wear resistance and corrosion resistance.
   这种超级硬铝合金具有极好的耐磨性和耐腐蚀性。
3. 3. The super-hard aluminum alloy is widely used in the automotive industry due to its high strength and low density.
   由于其高强度和低密度，这种超级硬铝合金在汽车工业中被广泛使用。