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Journal ArticleDOI

A study on the wear resistance of electroless Ni–P/Diamond composite coatings

01 Apr 2000-Wear (Elsevier)-Vol. 239, Iss: 1, pp 111-116
TL;DR: In this article, the effect of heat treatment, particle size and phosphorus content on the wear characteristics of composite electroless coating containing diamond particles was investigated and the results indicated substantial increase in wear resistance after the coated sample containing 9-10 wt% P content having fine diamond particle size is annealed around 350°C.
About: This article is published in Wear.The article was published on 2000-04-01. It has received 103 citations till now. The article focuses on the topics: Diamond & Electroless nickel.
Citations
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Journal ArticleDOI
15 Mar 2007-Wear
TL;DR: In this paper, the wear resistance of Ni-P alloy coatings manufactured by pulse current (PC) electroforming technology has been investigated at ambient temperature and without lubricants, and the results showed that the internal stress of the PC-deposited Ni−P coating is much lower than that of direct current (DC) deposited Ni·P coating.

55 citations

Patent
12 Oct 2006
TL;DR: In this article, a high velocity air fuel thermal spray process (HVAF) is used to create thick coatings in excess of about 500 microns with high percentages of primary carbide for longer life better erosion resistant coatings.
Abstract: Erosion resistant coating processes and material improvements for line-of-sight applications. The erosion resistant coating composition includes nanostructured grains of tungsten carbide (WC) and/or submicron sized grains of WC embedded into a cobalt chromium (CoCr) binder matrix. A high velocity air fuel thermal spray process (HVAF) is used to create thick coatings in excess of about 500 microns with high percentages of primary carbide for longer life better erosion resistant coatings. These materials and processes are especially suited for hydroelectric turbine components.

55 citations

Journal ArticleDOI
TL;DR: In this article, Ni-P/nano-diamond composite deposition were coated on steel substrate and the structure of the coatings and corrosion resistance of them were investigated by scanning electron microscopy (SEM) and electrochemical evaluations in salty media.

54 citations

Journal ArticleDOI
TL;DR: In this article, the surface-modified diamond powder was suspended into a watts nickel bath, which is a kind of popular bath for Ni electro plating, with MEGAFAC F-150BR, which was a surfactant.

51 citations

Journal ArticleDOI
15 Nov 2015-Wear
TL;DR: In this article, a Ni-Al 2 O 3 /graphite composite coating was applied on LY12 aluminum alloys using a three-step process that involved electrophoresis and electrodeposition.

51 citations

References
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Journal ArticleDOI
01 Nov 1961-Wear
TL;DR: In this article, a discussion of several important aspects of evaluating wear resistance is presented, focusing on abrasion, which is a large area of the complex field of wear, and the merit of these several qualities should be checked by statistical mathematics to avoid erroneous conclusions and misplaced confidence.

54 citations

Journal Article
TL;DR: In this article, the formation of the Ni 3 Si compound and wear mechanism of the composite coatings are discussed and structural analysis confirms that a new phase of Ni 3Si compound exists in the Ni-P-SiC deposits annealed at 650 °C for 1 hr.
Abstract: Electroless Ni-P-SiC composite coatings were investigated from the viewpoint of bath formulation, technology and coating properties. A sound and homogeneous deposit containing 25-30 vol. percent SiC can be produced, using an optimum bath formulation and technology. In comparison with Ni-P coatings, Ni-P-SiC composite coatings possess greater hardness and higher porosity, as well as lower adhesion and corrosion resistance. It is a significant advantage that the wear resistance of the composite coating is considerably increased. Heat treatment at high temperature can improve adhesion and wearability of the composite coating. Structural analysis confirms that a new phase of Ni 3 Si compound exists in the Ni-P-SiC deposits annealed at 650 °C for 1 hr. In this paper, formation of the Ni 3 Si compound and wear mechanism of the coatings are discussed.

24 citations

Journal Article
TL;DR: In this paper, a mixture of microcrystalline nickel and amorphous phases was observed to be a mixture based on X-ray diffraction and transmission electron microscopy.
Abstract: Electroless Ni-P-B deposits with weight percentages of 0.72 P and 4.15 B; 1.87 P and 4.87 B, were observed to be a mixture of microcrystalline nickel and amorphous phases, based on X-ray diffraction and transmission electron microscopy. On annealing, Ni 3 P and Ni 3 B precipitated along with crystalline nickel in one step. The microhardness of the deposits showed typical precipitation hardening behavior, with hardness increasing from about 550 VHN in the as-deposited condition, to about 1000 VHN in the fully crystallized condition

6 citations