中國(guó)有色金屬學(xué)報(bào)
ZHONGGUO YOUSEJINSHU XUEBAO
| 第18卷 第11期 總第116期 2008年11月 |
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文章編號(hào)：1004-0609(2008)11-1983-06
以蔗糖為前驅(qū)體火焰噴涂原位TiC增強(qiáng)Ni基復(fù)合涂層的制備
張守全1, 2，王海濤1，黃繼華1，朱警雷1，劉慧淵1，張 華1
(1. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083；
2. 廈門金鷺特種合金有限公司，廈門 361006)
摘 要: 以蔗糖為碳源，采用前驅(qū)體熱分解技術(shù)制備Ni-Ti-C系反應(yīng)熱噴涂混合粉末，通過(guò)氧乙炔火焰噴涂技術(shù)合成并同時(shí)沉積原位TiC顆粒增強(qiáng)的Ni基合金復(fù)合涂層。利用XRD和SEM研究混合粉末和涂層的相成分和組織結(jié)構(gòu)，分析TiC/Ni復(fù)合涂層的硬度和耐磨性。結(jié)果表明：反應(yīng)火焰噴涂TiC/Ni復(fù)合涂層主要由TiC和Ni基體組成，并含少量的Ni3Ti和Ti3O5；涂層由復(fù)合強(qiáng)化片層相互疊加而成，復(fù)合強(qiáng)化片層中TiC顆粒均勻分布于Ni基體中，TiC顆粒呈球形，粒度達(dá)到亞微米級(jí)；涂層具有較高的硬度和耐磨性，復(fù)合強(qiáng)化片層顯微硬度為HV0.2 1 433，涂層的耐磨性能遠(yuǎn)優(yōu)于基板材料45號(hào)鋼和對(duì)比涂層Ni60的耐磨性。
關(guān)鍵字: TiC/Ni復(fù)合涂層；反應(yīng)熱噴涂；蔗糖；原位TiC顆粒
Preparation of in situ TiC reinforced Ni-based composite coatings by flame spraying using sucrose as carbonaceous precursor
ZHANG Shou-quan1, 2, WANG Hai-tao1, HUANG Ji-hua1, ZHU Jing-lei1, LIU Hui-yuan1, ZHANG Hua1
（1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Xiamen Golden Egret Special Alloy Co. Ltd., Xiamen 361006, China）
Abstract:A kind of Ni-Ti-C composite powder for reactive thermal spraying was prepared by thermal decomposition of precursor with sucrose as carbon source. In-situ TiC reinforced Ni-based composite coatings were synthesized and deposited simultaneously by oxyacetylene flame spraying of the composite powder. XRD and SEM were employed to analyze the compositions and microstructures of these composite powders and coatings. The hardness and wear resistance of TiC/Ni composite coatings were investigated. The results show that the composite coating is composed of TiC, Ni and a little Ni3Ti and Ti3O5. The coating is formed by superposition of composite layers in which many TiC particles are uniformly distributed in Ni matrix, and the TiC particles in these layers are spherical or near-spherical with submicron-scale sizes. The microhardness of the composite layers reaches HV0.2 1 433. The wear resistance of TiC/Ni composite coating is much better than those of 45# steel substrate and Ni60 coating.
Key words: TiC/Ni composite coating; reactive thermal spraying; sucrose; in-situ TiC particle
