(中南大學(xué) 粉末冶金國家重點實驗室，長沙 410083)
摘 要: 在金屬反應(yīng)熔滲法(RMI)制備的C/C-ZrC-Cu復(fù)合材料上采用大氣等離子噴涂法(APS)得到厚度為1.3 mm的W涂層。運用掃描電鏡-能譜(SEM-EDS)，X射線衍射(XRD)測試技術(shù)分析研究了等離子噴涂W與C/C-CuZr復(fù)合材料界面相組成。結(jié)果表明：C/C復(fù)合材料反應(yīng)熔滲法采用Cu-48.9%Zr(摩爾分?jǐn)?shù))粉末制備出均勻的熔滲組織，這是因為Zr提高了Cu 在1300 ℃的C/C復(fù)合材料中的潤濕性，在熔滲過程中生成了正交晶系相Cu10Zr7。W涂層與C/C-ZrC-Cu復(fù)合材料的結(jié)合類型以擴散結(jié)合為主，其界面區(qū)內(nèi)主要是W和C通過包晶反應(yīng)生成WC擴散層，反應(yīng)擴散層厚度約為10 um。
關(guān)鍵字: C/C-ZrC-Cu復(fù)合材料；金屬反應(yīng)熔滲；大氣等離子噴涂；W涂層
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:W coating with thickness of 1.3 mm was successfully deposited by the atmosphere plasma spray (APS) technology on C/C-ZrC-Cu composite which was fabricated by reactive metal infiltration (RMI). Phase composition of interface between W coating and C/C-ZrC-Cu composite was investigated using a combination of X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray analysis (SEM-EDS). The results show that good performances of C/C-ZrC-Cu composite are obtained by reactive infiltration method with using powders of Cu-48.9% Zr, and Zr element can increase the wettability of Cu in C/C composite at 1300 ℃, the orthorhombic phase Cu10Zr7 is found in the composite. The type of bonding between W coating and C/C-ZrC-Cu composite is diffusion bonding on the main area of the interface. The diffusion bonding of WC layer is produced by peritectic reaction of phase W and C, and the thickness of reaction-diffusion layer is about 10 μm.
Key words: C/C-ZrC-Cu composite; RMI; APS; W coating
