INFLUENCE OF VELOCITY, CONCENTRATION, AND SIZE OF SILT PARTICLES ON EROSION OF THERMAL SPRAYED Ni/TiO2/Al2O3 COATINGS

被引：1
作者：
Sharma, Vibhu [1 ]
Kaur, Manpreet [2 ]
Bhandari, Sanjeev [2 ]
Singh, Surinder [3 ]
机构：
[1] Baddi Univ Emerging Sci & Technol, Baddi 173205, Himachal Prades, India
[2] Baba Banda Singh Bahadur Engn Coll, Fathegarh Sahib 140407, Punjab, India
[3] Swinburne Univ Technol, John St, Hawthorn, Vic 3122, Australia
来源：
SURFACE REVIEW AND LETTERS | 2022年
关键词：
Hydro-turbine steel; HVFS; Ni; TiO2; Al2O3; coatings; slurry erosion; SEM; SLURRY EROSION; IMPACT ANGLE; PERFORMANCE; BEHAVIOR; STEEL; WC-10CO-4CR; CORROSION; WEAR;
D O I：
10.1142/S0218625X22400017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The presence of silt sediments in the flowing river is the primary reason for the severe failure of hydro-power turbine components. This study insights the effect of erosion parameters on the performance of two multi-dimensional novel compositions (namely Ni-40TiO(2) and Ni-20TiO(2)-20Al(2)O(3)) developed on the CA6NM turbine steel by high velocity flame spray (HVFS) method. The Ni-40TiO(2) coating with lower porosity, higher fracture toughness, and microhardness, showed the highest slurry erosion resistance than the other counterparts. This outstanding performance is attributed to the uniform distribution of the multi-dimensional TiO2 grains in the coating, which effectively reduces the material loss rate during slurry erosion. The Ni-40TiO(2) coating indicated a mixed mechanism of material removal, while the brittle mechanism was observed in the case of Ni-20TiO(2)-20Al(2)O(3) coating. A model has been proposed to estimate the erosion rate of these proposed coatings.
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页数：22
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