本文選題：陶瓷涂層 + 溶膠凝膠法�。� 參考：《長江大學(xué)》2017年碩士論文

【摘要】：本論文簡要地綜述了金屬基陶瓷復(fù)合涂層的研究現(xiàn)狀和溶膠凝膠法制備金屬基陶瓷復(fù)合涂層的研究現(xiàn)狀,并對溶膠凝膠法制備鋼基陶瓷涂層的技術(shù)進(jìn)行分析。利用改變用量和正交試驗(yàn)相結(jié)合的試驗(yàn)方法,選擇溶膠凝膠法制備鋼基陶瓷復(fù)合涂層的配方和固化工藝;利用掃描電鏡(SEM)、能譜儀(EDX)和X射線衍射(XRD)來進(jìn)行陶瓷復(fù)合涂層成分研究及微觀組織結(jié)構(gòu)觀察,分析研究微觀組織結(jié)構(gòu)和截面結(jié)合機(jī)理;對鋼基陶瓷復(fù)合涂層的性能進(jìn)行測試和分析,根據(jù)測試結(jié)果,分析鋼基陶瓷復(fù)合涂層的耐磨性、結(jié)合強(qiáng)度、抗熱震性和耐腐蝕性。通過多次試驗(yàn)得出:采用溶膠凝膠法在Q235鋼基體表面制備性能優(yōu)良的陶瓷復(fù)合涂層是可行的。陶瓷復(fù)合涂層的配方:陶瓷骨料氧化鋁、二氧化硅和氧化鉻配比為4:3:1,復(fù)合溶膠水玻璃和硅溶膠配比7:3,陶瓷骨料和復(fù)合溶膠配比1:1.2;陶瓷復(fù)合涂層的固化工藝:涂層漿料放置時間為30分鐘,并隔5分鐘充分?jǐn)嚢枰淮?固化方式為開始升溫90℃,保溫2小時,再次升溫300℃,保溫一個小時,再升溫到400℃,以每分鐘升溫1-2℃,直到700℃,保溫十分鐘后隨爐冷卻。通過掃描電鏡、能譜儀和X射線衍射的結(jié)果與分析,陶瓷復(fù)合涂層有Fe2Al4Si5018、NaAl(SiO3)2、Fe2SiO4、FeSi和Al86Cr14等新相;陶瓷復(fù)合涂層表面質(zhì)量較好,氣孔較少,致密性較好;陶瓷復(fù)合涂層和Q235鋼基體界面有化學(xué)作用、吸附作用、機(jī)械作用和擴(kuò)散作用,這些作用相互補(bǔ)充,有效地提高陶瓷復(fù)合涂層和鋼基體結(jié)合強(qiáng)度。根據(jù)陶瓷復(fù)合涂層的性能測試結(jié)果,溶膠凝膠法在Q235鋼基體制備的陶瓷復(fù)合涂層比Q235鋼基體的耐磨性提高了3.2倍;陶瓷復(fù)合涂層和Q235鋼基體的平均結(jié)合強(qiáng)度為3.3MPa,陶瓷復(fù)合涂層自身平均結(jié)合強(qiáng)度0.85MPa,陶瓷復(fù)合涂層與鋼基體有良好的結(jié)合強(qiáng)度;在600℃、700℃、800℃、900℃抗熱震試驗(yàn)中,陶瓷復(fù)合涂層抗熱震次數(shù)分別為31次、24次、19次、7次,陶瓷復(fù)合涂層有良好的抗熱震性能;陶瓷復(fù)合涂層耐酸性、耐堿性和耐鹽性比Q235鋼分別提高8-9倍、6-7倍、3-4倍,比1Cr18Ni9不銹鋼分別提高2-3倍、2-3倍、2倍,陶瓷復(fù)合涂層能有效的提高基體的耐腐蝕性能。
[Abstract]:In this paper, the research status of metal-based ceramic composite coating and sol-gel preparation of metal-based ceramic composite coating are briefly reviewed, and the technology of preparing steel based ceramic coating by sol-gel method is analyzed. The formula and curing process of the composite coating prepared by sol-gel method were selected by the combination of changing dosage and orthogonal test. The composition and microstructure of ceramic composite coatings were studied by means of SEM, EDX and XRD. The microstructure and cross-section bonding mechanism of ceramic composite coatings were analyzed and studied by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The properties of steel based ceramic composite coating were tested and analyzed. According to the test results, the wear resistance, bonding strength, thermal shock resistance and corrosion resistance of steel based ceramic composite coating were analyzed. The results show that it is feasible to prepare ceramic composite coatings on Q235 steel by sol-gel method. Ceramic composite coating formulation: ceramic aggregate alumina, The ratio of silica to chromium oxide is 4: 3: 1, the ratio of composite sol, water glass and silica sol is 7: 3, and the ratio of ceramic aggregate and composite sol is 1: 1.2. The curing process of ceramic composite coating is as follows: the coating slurry is placed for 30 minutes, and the mixture is stirred at full intervals of 5 minutes. The curing method is to start at 90 鈩，

本文編號：2024952