Effect of alumina content on surface morphology and hardness of Ni-P-Al2O3(α) electroless composite coatings

被引：74

作者：

Alirezaei, S ^{[1
]}

Monirvaghefi, SM ^{[1
]}

Salehi, M ^{[1
]}

Saatchi, A ^{[1
]}

机构：

[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 84154, Iran

来源：

SURFACE & COATINGS TECHNOLOGY | 2004年 / 184卷 / 2-3期

关键词：

electroless nickel; alumina; composite coating; roughness; hardness;

D O I：

10.1016/j.surfcoat.2003.11.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this research, alumina particles with various contents of 5, 10, 15, 20 and 25 g/l in bath were co-deposited within Ni-P deposits on AISI 1045 steel discs by electroless process. The composite coatings were heat treated at 200, 400 and 600 degreesC for 1 h and structural changes were evaluated by X-ray diffraction (XRD) analysis. Surface and cross-section morphology of composite deposits have been investigated by scanning electron microscopy (SEM) and volumetric percent of co-deposited particles have been determined by using an image analysis system. The results showed that some parameters such as deposition rate, co-deposited particles percent, roughness and hardness of Ni-P-Al2O3 coatings have been influenced by concentration of alumina in bath whereas average roughness and hardness increased as particles content increased. Also, surface morphology of deposits has been changed from smooth state to nodular appearance. It has been found that heat treated composite deposits in approximately 400 degreesC have the greatest hardness values. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：170 / 175

页数：6

共 13 条

[1] Autocatalytic nickel coatings on aluminium with improved abrasive wear resistance [J].

Apachitei, I ;

Duszczyk, J .

SURFACE & COATINGS TECHNOLOGY, 2000, 132 (01) :89-98

[2] The effect of heat treatment on the structure and abrasive wear resistance of autocatalytic NiP and NiP-SiC coatings [J].

Apachitei, I ;

Tichelaar, FD ;

Duszczyk, J ;

Katgerman, L .

SURFACE & COATINGS TECHNOLOGY, 2002, 149 (2-3) :263-278

[3] Solid-state reactions in low-phosphorus autocatalytic NiP-SiC coatings [J].

Apachitei, I ;

Tichelaar, FD ;

Duszczyk, J ;

Katgerman, L .

SURFACE & COATINGS TECHNOLOGY, 2001, 148 (2-3) :284-295

[4] Relationships among crystallographic structure, mechanical properties and tribological behaviour of electroless Ni-P(9%)/B4C films [J].

Bozzini, B ;

Martini, C ;

Cavallotti, PL ;

Lanzoni, E .

WEAR, 1999, 225 :806-813

[5]

Feldstein MD, 1998, PLAT SURF FINISH, V85, P248

[6] Electrodeposition and sliding wear resistance of nickel composite coatings containing micron and submicron SiC particles [J].

Garcia, I ;

Fransaer, J ;

Celis, JP .

SURFACE & COATINGS TECHNOLOGY, 2001, 148 (2-3) :171-178

[7] Hardness, friction and wear characteristics of nickel-SiC electroless composite deposits [J].

Grosjean, A ;

Rezrazi, M ;

Takadoum, J ;

Berçot, P .

SURFACE & COATINGS TECHNOLOGY, 2001, 137 (01) :92-96

[8] Some morphological characteristics of the incorporation of silicon carbide (SiC) particles into electroless nickel deposits [J].

Grosjean, A ;

Rezrazi, M ;

Berçot, P .

SURFACE & COATINGS TECHNOLOGY, 2000, 130 (2-3) :252-256

[9] Development of electroless nickel-phosphorous composite deposits for wear resistance of 6061 aluminum alloy [J].

Hamid, ZA ;

Abou Elkhair, MT .

MATERIALS LETTERS, 2002, 57 (03) :720-726

[10] A study on the mechanism of formation of electrocodeposited Ni-diamond coatings [J].

Lee, EC ;

Choi, JW .

SURFACE & COATINGS TECHNOLOGY, 2001, 148 (2-3) :234-240

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