铜包裹碳化硅颗粒复合粉体的化学原位沉积制备与表征  

Preparation and Characterization of Cu Coated SiC Composite Powders by in-situ Chemical Deposition

作　　者：石锦罡[1,2,3] 姚辉[1,2] 陈名海[1] 刘宁[2] 李清文[1] 

机构地区：[1]中国科学院苏州纳米技术与纳米仿生研究所,苏州215123 [2]合肥工业大学材料科学与工程学院,合肥230009 [3]中国船舶重工集团公司第十二研究所,兴平713102

出　　处：《无机材料学报》2012年第8期795-799,共5页Journal of Inorganic Materials

基　　金：江苏省产学研前瞻性联合研究项目(BY2009129);江苏省基础研究计划(自然科学基金)项目(BK2009565);苏州市科技项目(SWG0905)~~

摘　　要：以铜氨离子为铜源,水合肼为还原剂,在表面预氧化的SiC表面,采用一步原位化学沉积法制备了均匀包裹Cu颗粒的SiC复合粉体.采用扫描电子显微镜(SEM)、X射线衍射(XRD)、傅立叶红外光谱(FT-IR)、Zeta电位等测试表征手段研究了工艺条件对原位沉积反应的影响.研究发现SiC表面预氧化形成的SiO2层能显著增强对铜氨离子吸附能力,有助于原位还原生成单质Cu,形成近乎连续包裹层.控制反应体系中铜氨离子浓度和反应温度可以影响反应速率,从而控制Cu颗粒的沉积速率和包裹效果.对比研究表明,在0.2 mol/L铜氨离子溶液中70℃反应,在预氧化的SiC表面能够获得最佳包裹层.A facile one-step in-situ chemical deposition method was introduced to synthesize Cu-Coated SiC composite powders,using [Cu（NH3）4]2＋ ions as copper source and N2H4.H2O as reductant,respectively.Scanning electronic microscope（SEM）,X-Ray diffraction（XRD）,Fourier transform infrared spectroscope（FT-IR） and Zeta potential were used to investigate the structure,morphology and composition of the prepared core/shell composite powders.The corresponding formation mechanism was proposed based on the comparative study.It is revealed that the SiO2 film on the surfaces of pre-oxidated SiC particles can effectively enhance the adsorption of [Cu（NH3）4]2＋ ions toward the negatively charged surface,which is favorable to the following in-situ reduction by N2H4.H2O around SiC particles.Nearly continuous Cu coating can be formed by changing the reaction process.The concentration of [Cu（NH3）4]2＋ ions and reaction temperature affect the reaction rate and coating structure.The process parameters are optimized to obtain the best coating structure with [Cu（NH3）4]2＋ ions concentration of 0.2 mol/L and reaction temperature of 70℃,respectively.

关 键 词：SIC Cu 金属陶瓷复合材料 原位化学沉积 

分 类 号：TB34[一般工业技术—材料科学与工程]