A novel multi-layer spray deposition

A novel spray deposition technology with the characteristics of multi-layer deposition, the combination of forced external cooling and internal water-cooling of the substrate was developed. Compared with the conventional spray deposition technology, the novel technology exhibits the specific advantages, including larger solidification rate, higher dimensional precision, and ease to manufacture large preforms. The law of multi-layer spray deposition was studied, and Al-Fe-V-Si alloy with good high-temperature mechanical properties and 6066Al/SiC_p composites with excellent room-temperature mechanical properties are prepared by this novel technology. Project supported by the National Education Committee Doctorate Program Fund of China Synopsis of the first author Chen Zhenhua, professor, born in October 1945, major in rapid solidification, powder metallurgy, spray deposition, mechanical alloying and manufacturing technology for ultratine powder; won several national awards; invented multi-phase atomization rapid sdidification equipment, proposed a famous forming principle of quasicrystal called “adding principle”, gained a patent on spray deposition; preparing technology for ultrafine powder has been utilized in median commercial scale.