(1. 青島理工大學(xué) 機械工程學(xué)院，青島 266033;
2. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院， 北京 100083)
摘 要: 以鈦鐵、 鐵和石墨為主要原料， 用反應(yīng)火焰噴涂技術(shù)制備TiC/Fe復(fù)合涂層。 在噴涂過程中， 在氧乙炔火焰條件下引燃Fe-Ti-C體系的自蔓延高溫合成(SHS)反應(yīng)， 研究該SHS反應(yīng)的動力學(xué)。 結(jié)果表明， 適當(dāng)增加鐵和石墨， 或減小反應(yīng)組元的粒度， 會顯著降低體系的點火溫度， 可促進Fe-Ti-C反應(yīng)體系在氧乙炔火焰中的點火進程。 噴涂粉末粒度、 氧乙炔火焰功率、 噴涂距離以及噴涂粉末的原料配比均會影響Ti-C間的反應(yīng)程度， 從而影響Fe-Ti-C體系的反應(yīng)動力學(xué)。
關(guān)鍵字: 自蔓延高溫合成; 反應(yīng)動力學(xué); TiC/Fe涂層; 氧乙炔火焰; 熱噴涂
（1. School of Mechanical Engineering, Qingdao Technological University,
Qingdao 266033, China;
2. School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083, China）
Abstract: The TiC/Fe composite coatings were prepared by reactive flame spray using ferrotitanium, iron and graphite as the starting materials, which need ignite the self-propagation high-temperature synthesis (SHS) reaction of Fe-Ti-C system by oxygen-acetylene flame. The dynamics of this SHS reaction were studied. The ignition temperature is reduced by increasing Fe content and graphite content or by decreasing the size of reactive components. The degree of the complete reaction is affected by spray powder size, oxygen-acetylene flame power, spray distance and the composition of spray powder.
Key words: self-propagation high-temperature synthesis; reaction dynamics; TiC/Fe coatings; oxygen-acetylene flame; thermal spray
