此金属基复合材料由美国陆军研制,通过在合金中添加高强度轻型空心球使合金变成泡沫。材料可以浮在水上,因此用其制造的战舰即使船体结构损伤也不会下沉。还可以制造坚不可摧的军舰和超轻型车辆。这种合成的泡沫材料基体为镁合金,通过添加轻质碳化硅空心球制成。碳化硅球壳可承受每平方英寸25 000磅(172 MPa)以上的压力,是灭火水龙头最大压力的100倍。由于具有高比强和耐热性,新材料可改善车辆燃油性。对于发动机和排气部件复合材 Developed by the U.S. Army, the metal matrix composites made the alloy foam by adding high strength lightweight hollow spheres to the alloy. Materials can float on water, so warships built therewith will not sink even if the hull structure is damaged. Can also create indestructible warships and ultralight vehicles. The synthetic foam substrate is a magnesium alloy made by adding lightweight silicon carbide hollow spheres. Silicon carbide spherical shell can withstand 25,000 pounds per square inch (172 MPa) above the pressure, the fire faucet is 100 times the maximum pressure. Due to its high specific strength and heat resistance, the new material improves the fuel economy of vehicles. For engine and exhaust components composite