Effect of Al2O3 Nanoparticles and Heat Treatment on the Wear Resistance of Electrodeposited Ni-W/Al2O3 Composite Coatings

2021 ◽  
Author(s):  
Xinyang Shi ◽  
Zhongquan Zhang ◽  
Leyu Dai ◽  
Yin Lv ◽  
Zhao Xu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Composite Coatings ◽  
Al2o3 Nanoparticles ◽  
Al2o3 Composite

Mechanical Milling Prepared Nano-Sized Al2O3 Particles Utilized in Electroless Plating Ni-P- Al2O3 Composite Coatings

2012 ◽  
Vol 602-604 ◽  
pp. 1700-1705 ◽  
Author(s):  
Ai Zhi Yu ◽  
Mao Dong Li ◽  
Jin Mei Lin ◽  
Shu Kuan Zhang
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Wear Resistance ◽  
Mechanical Milling ◽  
Chemical Method ◽  
Composite Coatings ◽  
Micro Hardness ◽  
Mechanical Method ◽  
Al2o3 Composite ◽  
Steel Substrates

In this paper, nano-sized Al2O3 particles were prepared by mechanical milling, and Ni-P-Al2O3 composite coatings were plated on Q235 steel substrates, which plating solutions were containing different concentrations Al2O3 particles. The morphology, phase and particle size distribution of the as-prepared Al2O3 particles, and the properties of the coatings were investigated. The results show that, the morphology of the as-prepared Al2O3 particles were spherical and almost size under 100nm, the coatings were uniformly thickness and the Al2O3 particles were uniformly dispersed in the coatings, after heat treatment, the micro-hardness and wear resistance of the coatings were significantly improved, compared with the chemical method prepared Al2O3 particles, the mechanical method prepared Al2O3 particles had the same performance in improving the micro-hardness of the coatings.

Laser Heat Treatment and Wear Resistance of Electroless Plating Ni-P-Nano-Al2O3 Composite Coatings

2008 ◽  
Vol 35 (4) ◽  
pp. 610-614 ◽  
Author(s):  
郑晓华 Zheng Xiaohua ◽  
宋仁国 Song Renguo ◽  
姚建华 Yao Jianhua
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Electroless Plating ◽  
Composite Coatings ◽  
Laser Heat Treatment ◽  
Laser Heat ◽  
Al2o3 Composite

TiC-TiSi2-Al2O3 composite coatings prepared by spray drying, heat treatment and plasma spraying

2021 ◽  
Vol 857 ◽  
pp. 158221
Author(s):  
Yu-duo Ma ◽  
Wei Li ◽  
Ming-yan Guo ◽  
Yong Yang ◽  
Yu-hang Cui ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Spray Drying ◽  
Plasma Spraying ◽  
Composite Coatings ◽  
Al2o3 Composite

scholarly journals Influence of the energy electron beam exposure regimes on the structure and mechanical properties of composite coatings

2020 ◽  
pp. 23-27
Author(s):  
T.A. Krylova ◽  
◽  
Y.A. Chumakov ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Electron Beam ◽  
Structural Changes ◽  
Composite Coatings ◽  
Initial State ◽  
Austenitic Structure ◽  
Solid Carbide ◽  
Soft Ferrite

The effect of heat treatment on the structure and properties of composite coatings based on chromium carbide with titanium carbide fabricated by non-vacuum electron beam cladding without has been studied. It was shown that tempering leads to a decrease in microhardness and wear resistance, which is associated with the decomposition of the austenitic structure with the formation of a soft ferrite-carbide structure. The post heat treatment tempering was showed to decrease of microhardness and wear resistance, which leads to the decomposition of the austenitic structure with the formation of a soft ferrite-carbide structure. The bulk quenching of coatings after tempering leads to an increase in microhardness comparable to the values of microhardness in the initial state after electron beam cladding, due to the formation of high hard martensite. The wear resistance of composite coatings after tempering is lower than after cladding due to brittle martensite, which is not able to hold solid carbide particles. The composite coatings obtained at the optimal processing conditions have a combination of improved properties and do not require additional heat treatment, resulting in structural changes, causing a decrease in mechanical properties.

Effect of surfactant on the electrodeposition and wear resistance of Ni–Al2O3 composite coatings

2006 ◽  
Vol 434 (1-2) ◽  
pp. 319-325 ◽  
Author(s):  
Li Chen ◽  
Liping Wang ◽  
Zhixiang Zeng ◽  
Junyan Zhang
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Al2o3 Composite

Electroless deposition bicomponent dispersed phase composite coatings

2021 ◽  
pp. 86-89
Author(s):  
G.M. Mukhametova ◽  
A.A. Abrashov ◽  
E.G. Vinokurov ◽  
V.D. Skopintsev
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Succinic Acid ◽  
Electroless Deposition ◽  
Composite Coatings ◽  
Dispersed Phase ◽  
Bath Composition ◽  
Hard Particles ◽  
Coating Composition ◽  
Soft Particles

The deposition of bicomponent composite coatings containing both hard and soft particles is studied. Technologically important characteristics (deposition rate, coating composition) of electroless deposition of bicomponent Ni—Cu—P— Cr2O3—MoS2 composite coatings from slightly acidic baths are determined. Bath composition, mol/L: NiSO4 — 0,12; CuSO4 — 0,0016; NaH2PO2 — 0,37; NH2CH2COOH — 0,13; Succinic acid — 0,18; Pb (CH3COO)2 — 10–5; рН 6,5. A mixture of dispersed hard particles (Cr2O3) and soft particles (MoS2) was added to the solution for electroless deposition of a copper doped Ni—P alloy. It was found that when adding a mixture of dispersed Cr2O3 (40...25 % wt.) and MoS2 (60...75 % wt.) at a concentration of 10 g/L, the solution remains stable during deposition and allows the formation of Ni — Cu (1...1.5 wt.%) — P (4 wt.%) — Cr2O3(3 % wt.) — MoS2 (0.12— 0.16 % wt.) coatings at a rate of 15 mg/(cm2 •h). Deposited coatings after heat treatment at 400 °C has a microhardness of 11.1...11.2 GPA. It is concluded that the technology of electroless deposition of bicomponent composite coatings Ni—Cu—P—Cr2O3—MoS2 is promising for obtaining materials with increased hardness and wear resistance.

Fabrications of Electroless Ni-P Composite Coatings before and after Annealing and Tribological Analyses

2015 ◽  
Vol 642 ◽  
pp. 286-291
Author(s):  
Chang Shuo Chang ◽  
Kung Hsu Hou ◽  
Ming Der Ger ◽  
Chen Kuei Chung ◽  
Jen Fin Lin
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Crystalline Phase ◽  
Composite Coatings ◽  
Plating Bath ◽  
Sic Particles ◽  
Before And After ◽  
Mechanical Performances ◽  
Electroless Ni

In the present study, SiC reinforced particles were introduced to the Ni-P plating bath, and developed high SiC content composite coatings. Thin films nature properties and mechanical performances were evaluated well. The results showed that the Ni-P alloy embedded SiC particles formed a few cavities, and reduced coatings hardness and wear resistance in as-plated condition. After 400°C heat-treatment, Ni3P crystalline phase formed and reached the max hardness, and conducted excellent trybological performances. SiC particles were decoposited in 600°C and reacted with Ni to form Ni3Si and Ni5Si2, caused the decreasing in hardness.

Sign in / Sign up

Export Citation Format

Share Document