Synthesis of anodizing composite films containing superfine Al2O3 and PTFE particles on Al alloys

Study on anodic oxidation process and property of composite film formed on Ti–10V–2Fe–3Al alloy in SiC nanoparticle suspension

“…Among these technologies, anodic oxidation is widely applied owing to its low cost and simple operation. Compared to the ordinary oxide films, composite oxide films of aluminum, magnesium and titanium alloys possess much better properties, so they have been studied increasingly [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Aliofkhazraei et al added Si 3 N 4 and Al 2 O 3 nanoparticles to electrolyte generating composite coatings which improved wear resistance of titanium substrate [6,16].…”

Enhanced tribological behavior of anodic films containing SiC and PTFE nanoparticles on Ti6Al4V alloy

“…The reason that composite films containing organic polymer or ceramic nanoparticles shows enhanced tribological property is that organic polymer have a self-lubrication property [16] and ceramic nanoparticles can improve the hardness [17]. However, organic polymer composite films cannot reach high hardness [16] and ceramic nanoparticles also behave as a high friction coefficient and have high surface roughness [8]. Therefore, composite films contain SiC and PTFE nanoparticles are expected to be more attractive on the synergistic effect.…”

“…In recent years, many investigations of composite oxidation films with nanoparticles have been taken on aluminum alloys [7][8][9][10][11][12][13][14][15]. Some investigations reveal that organic polymer such as PTFE [8][9][10] and hard ceramic materials such as SiC and ZrO 2 [11][12][13][14][15] can significantly improve the tribological property of oxide films. The reason that composite films containing organic polymer or ceramic nanoparticles shows enhanced tribological property is that organic polymer have a self-lubrication property [16] and ceramic nanoparticles can improve the hardness [17].…”

A composite anodizing coating containing superfine Al2O3 particles on AZ31 magnesium alloy

“…Chen et al prepared anodized composite films containing superfine Al 2 O 3 and PTFE particles. Results indicated that the composite film with two kinds of particles has good wear-resistance and selflubricating properties [16]. According to Zeng et al composite anodizing coatings consisting of SiC, TiO 2 and Al 2 O 3 powders on aluminum have high hardness and excellent corrosion resistance [17].…”

“…The pore-free layer prevents corrosion, while the porous layer serves as a basis for painting or proofing [13]. Although anodizing coatings can serve a lot of purpose, the quest for improved properties such as higher hardness, lubricating, anti-wear properties, and corrosion resistance has led to the incorporation of many soft and hard particles in the matrix of the coating such as TiO 2 , ZrO 2 , Al 2 O 3 , SiC, PTFE and Silica [14][15][16][17][18][19]. Chen et al prepared anodized composite films containing superfine Al 2 O 3 and PTFE particles.…”