【摘 要】
：
The coatings were produced on Ti6Al4V by lasercladding the mixture of Ni-based alloy and different contents of TaC (0 wt％,5 wt％,10 wt％,20 wt％,30 wt％,40 wt％).The micro
【机 构】
：
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
论文部分内容阅读
The coatings were produced on Ti6Al4V by lasercladding the mixture of Ni-based alloy and different contents of TaC (0 wt％,5 wt％,10 wt％,20 wt％,30 wt％,40 wt％).The microstructure and corrosion behavior of the coatings were investigated in detail.The coating without TaC is composed of TiNi/Ti2Ni (matrix) and TiC/TiB/TiB2 (reinforcement).Moreover,TaC is precipitated again and TiC/TiB/TiB2 solid solutions containing Ta are formed in the coatings.Corrosion potential of the coatings (-0.639,-0.636,-0.547,-0.534,-0.471 and-0.348 V) increases,and passive current density (1 × 10-5.4,1 × 10-5.6,1 × 10-6.4,1 × 10-6.8,1 × 10-6.7 and 1 × 10-6.9 A.cm-2) decreases.The passive films are more difficult to break down (breakdown potential of 0.003,0.080,0.204 and 0.605 V).When the content of TaC exceeds 20 wt％,no breakdown phenomenon is observed.The passive film on the surface of coating without TaC is mainly composed of TiO2,Al2O3,Cr2O3,CrO3,NiO,Ni2O3 and SiO2.After the addition of TaC,Ta2O5 is formed in the passive films.The content of Ta2O5 presents an increasing trend with the increase in the content of TaC.The addition of TaC has a positive effect on corrosion resistance of the coatings.
其他文献
研究背景红细胞中的血红蛋白是动物体内的运氧载体,是从外环境获取氧、血液向组织供给氧的关键因素,其分子结构的适宜性变化,是十分经济有效的高原习服适应机制。但是部分高
The catalytic effects of ZrC powder on the dehydrogenation properties of LiAlH4 prepared by designed mixing processes were systematically investigated.The onset
A combination study of magnetic and magnetostrictive properties in directionally cast (DC) (un-annealed) and differently heat-treated Fe-19 at％ Ga samples was ca
The B4C matrix composite intended for armor applications still presents restrictions,such as low sintering density,production of large parts and inherited britt
Ti44Al6Nb-based alloy ingots with different cerium (Ce) contents (0,0.05,0.10,0.15,0.20;at％) were prepared by non-consumable vacuum arc smelting face (WK-Ⅱ).The
Hydrogels are cross-linked polymers suitable for various applications,but the thermal conductivities of hydrogel-based composites have not been thoroughly inves
“高质量的展览会是体现企业管理水平的绝平台,也是展现企业形象、企业扩张的最好时机。国作为世界上唯一的纺织产业链比较完整的国我们也应该具有一个在世界上各方面都最强
Geopolymers,such as phosphate-based geopolymer,are promising materials that have drawn extensive attentions as wave-transparent candidates with low dielectric l
It is our great pleasure as Guest Editors of the journal “Rare Metals” to present the special issue on “Advanced Structural Ceramics Technology & Characteris
为了实现多接口车载自组织网络(VANET)车辆节点合理高效的信道接入,提出了一种基于车辆节点多接口状态字的时分竞争信道接入算法。根据车辆节点的多接口状态字给出了时隙划分