Papers by Author: Yan Qiu Wei

Abstract: A new approach was developed for surface modification of metallic surface. By treating nano-zirconia particles and metal surface in different charge state, nano-zirconia particles can be dispersedly inlaid in metal surface owing to electrostatic and nanometer effects. By using this method, metal components of complex shapes, especially those having inside surfaces, might be easily improved, i.e., enhanced surface hardness and wear rate.

Abstract: A new kind of polymer/layered silicate (PLS) nanocomposites-containing slurry was used to join green bodies of ZrO2 (8YSZ) and 95Al2O3 ceramics, without applied pressure. After sintering, a fine joint could be obtained without obvious cracks, pores and other defects, and the average flexural strength of the joints was comparable to that of the 95Al2O3 matrix. Effects of PLS on joining process were analyzed and the results showed suitability of PLS-containing slurry for green state joining ZrO2 to Al2O3 ceramics.

Abstract: In order to meet a need of application of photocatalyst, a slurry dipping method was adopted for nano-TiO2 coating on optical fiber. Three slurry states were designed and their effects on coating quality were investigated. Experimental results showed that paste state may lead to surface cracks in coating. Both flocculent and dispersive slurry states can form high quality coatings whose coating microstructures are different, the former resulted in a loose and thicker coating and the later resulted in a dense and thinner coating, which supplied a basis for further study on effect of photocatalytic reaction and design of photocatalyst reactor.