發(fā)布時間：2018-03-11 09:06

  本文選題：等離子噴涂　切入點：梯度熱障涂層　出處：《材料熱處理學(xué)報》2015年S2期 　論文類型：期刊論文

【摘要】：用正交試驗方法研究了等離子噴涂工藝的4個主要參數(shù)(噴涂距離、送粉量、主氣(N2)流量、噴涂電流)對梯度熱障涂層的過渡層孔隙率的影響,確定了最優(yōu)工藝參數(shù),并對工藝優(yōu)化后涂層的顯微組織和結(jié)合強度進行研究。結(jié)果表明:在這4個工藝因素中,送粉量、噴涂距離對過渡層的孔隙率影響較大;在梯度熱障涂層中,由基體到涂層表面,形成一種無宏觀結(jié)合界面的成分連續(xù)變化的組織結(jié)構(gòu);工藝優(yōu)化能顯著提高涂層的性能,優(yōu)化工藝后噴涂的梯度熱障涂層結(jié)合強度達到50 MPa。
[Abstract]:The effects of four main parameters of plasma spraying (spray distance, powder delivery rate, flow rate of main gas N _ 2) and spraying current on the porosity of transition layer of gradient thermal barrier coating were studied by orthogonal test method, and the optimum process parameters were determined. The microstructure and bonding strength of the coating were studied. The results showed that the porosity of the transition layer was greatly affected by the powder feeding amount and spraying distance, and in the gradient thermal barrier coating, the microstructure and bonding strength of the coating were studied. From the substrate to the surface of the coating, a kind of structure with continuous change of composition without macroscopic interface is formed, and the properties of the coating can be significantly improved by the optimization of the process, and the bonding strength of the gradient thermal barrier coating sprayed after optimization is up to 50 MPA.
【作者單位】： 機械科學(xué)研究總院;機械科學(xué)研究院浙江分院有限公司;
【基金】：浙江省科學(xué)技術(shù)廳項目(2009C11086)
【分類號】：TG174.44

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本文編號：1597487