Tribological properties of Ni-base alloy composite coating modified by both graphite and TiC particles

The graphite/CaF2/TiC/Ni-base alloy composite coating was prepared on the surface of 45 carbon steel by plasma spray. Effects of loads, friction counterparts and lubricants on the tribological properties of the composite coating were investigated. The results show that the wear rate of the GCTN composite coating against Si3N4is 0.67×10-3mm3/m, which is about 2 times that against GCr15 steel, because Si3N4induces micro-cutting wear of the composite coating. Water and NaCl solution may induce increasing of friction coefficients and wear rates. Especially, wear rate of the GCTN composite coating in NaCl solution is increased by 3.1 times compared with those under dry sliding and water. The GCTN composite coating presents better anti-wear property than Ni-base alloy coating in different environmental mediums.

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Residual Stress Field of Ellipsoidal Ceramic Particles Ni-Base Alloy Composite Coating

Key Engineering Materials - High-Performance Ceramics IV ◽

10.4028/0-87849-410-3.1527 ◽

2007 ◽

pp. 1527-1530

Author(s):

Xie Quan Liu ◽

Jian Zheng ◽

Zhan Jun Yao ◽

Bao Feng Li

Keyword(s):

Residual Stress ◽

Stress Field ◽

Composite Coating ◽

Base Alloy ◽

Alloy Composite ◽

Residual Stress Field ◽

Ceramic Particles

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Tribological properties of laser cladding TiB2 particles reinforced Ni-base alloy composite coatings on aluminum alloy

Rare Metals ◽

10.1007/s12598-014-0299-y ◽

2014 ◽

Vol 34 (11) ◽

pp. 789-796 ◽

Cited By ~ 10

Author(s):

Long He ◽

Ye-Fa Tan ◽

Xiao-Long Wang ◽

Qi-Feng Jing ◽

Xiang Hong

Keyword(s):

Aluminum Alloy ◽

Laser Cladding ◽

Tribological Properties ◽

Base Alloy ◽

Composite Coatings ◽

Alloy Composite ◽

Tib2 Particles

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Study on Tribology Properties of Graphite/TiC/Ni-Base Alloy Composite Coating

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.314-316.137 ◽

2011 ◽

Vol 314-316 ◽

pp. 137-142

Author(s):

Bin Cai ◽

Ye Fa Tan ◽

Hui Yong Ji ◽

Xiao Long Wang ◽

Long He ◽

...

Keyword(s):

Friction Coefficient ◽

Composite Coating ◽

Sliding Wear ◽

Base Alloy ◽

Alloy Coating ◽

Dry Sliding Wear ◽

Wear Loss ◽

Dry Sliding ◽

Alloy Composite ◽

Nacl Solution

In order to reduce friction coefficient of the Ni-base alloy coating and further improve its wear resistance, the graphite/TiC/Ni-base alloy composite coating was prepared on the surface of 45 carbon steel by plasma spray. Effects of loads, friction counterparts and lubricants on tribological properties of the coating were investigated. The results show that friction coefficient of the composite coating is reduced by 33% than that of the Ni-base alloy coating when worn against GCr15. Wear losses of the composite coating are less than those of the Ni-base alloy coating at all loads of 6N, 8N, 10N and 12N. Worn against Si3N4, friction coefficient of the composite coating is 13% less than that worn against GCr15, but its wear loss is 2.9 times of that worn against GCr15. Wear mechanism of the composite coating is micro cutting and brittle fraction when worn against Si3N4. Under lubrication of NaCl solution, friction coefficient of the composite coating is almost the same as that under dry sliding, wear loss is increased by 1.6 times. Stress corrosion and wedging effects of the NaCl solution are main wear mechanisms of the composite coating.

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Thermal Expansion Coefficient of Ni Base Alloy Composite Coating Containing Spheroidal Ceramic Grains

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.44-47.2148 ◽

2010 ◽

Vol 44-47 ◽

pp. 2148-2151

Author(s):

Xie Quan Liu ◽

Xin Hua Ni ◽

Shu Qin Zhang ◽

Wan Heng He

Keyword(s):

Thermal Expansion ◽

Thermal Expansion Coefficient ◽

Composite Coating ◽

Expansion Coefficient ◽

Base Alloy ◽

Thermal Strain ◽

Phase Cell ◽

Alloy Composite ◽

Random Orientation ◽

Two Phase

Ni base alloy composite coating containing spheroidal ceramic grains can be fabricated by a vacuum fusion sintering method. Composite coating was mainly composed of Ni base alloy and spheroidal ceramic grains with random orientation. The three-phase model is used to determine the thermal expansion coefficient of the composite coating. First, Eshebly-Mori-Tanaka method was used to determine thermal disturbance strain in two-phase cell aroused thermal inconsistency. Then, average thermal strain in the two-phase cell aroused by thermal inconsistency is gained by the means of volume equilibration. The two-phase cell is transverse isotropy and has two independent thermal expansion coefficients. Finely, based on mean strain of Ni base alloy ceramic composite coating containing spheroidal ceramic grains, the effective thermal expansion coefficient of the composite coating is obtained by considering random orientation of two-phase cells. Ni base alloy composite coating containing spheroidal ceramic grains is isotropy and has one independent thermal expansion coefficient.

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