研究了在高温合金K17表面上低压固体粉末包埋(LPPC)渗铝工艺.实验结果表明:在合金表面电镀Pd-20wt%Ni合金后,在950℃和1050℃渗铝制备铝化物涂层,与未经过电镀处理的样品相比,其渗铝速度得到提高,形成铝化物涂层的动力学在950℃和1050℃时符合抛物线规律.在950℃时,"S"渗铝量占总渗铝量的比例略大于18%,在1050℃时该比例为44.2%～47%,和渗铝温度有关,与样品预处理状态无关;提高渗铝温度,"S"渗铝比例提高.Pd元素加快了元素的扩散速度,促进了涂层的生长.
参考文献
| [1] | 李美栓.金属的高温腐蚀[M].北京:冶金工业出版社,2001 |
| [2] | 杜兴蒿 .NiAl及其合金的超塑性及高温力学行为的研究[D].哈尔滨工业大学,2002. |
| [3] | Goebel M.Interdiffusion between the platinum-modified aluminide coating RT22 and nikel-based single-phase superalloys at 1000and 1200℃[J].Fuel and Energy Abstracts,1995(36):283. |
| [4] | 张光业,张华,王振生,郭建亭,周兰章.NiAl-30.9Cr-3Mo-0.1Dy合金的高温氧化行为[J].稀有金属材料与工程,2006(05):719-723. |
| [5] | 李猛进 .Pd改性铝化物涂层的高温腐蚀行为[D].中国科学院金属研究所,2003. |
| [6] | Puris A L;Warnes B M.The effects of platinum concentration on the oxidation resistance of superalloys coated with single-phase platinum aluminide[J].Surface and Coatings Technology,2001(148):140. |
| [7] | Puris A L;Warnes B M.The effects of platinum concentration on the oxidation resistance of superalloys[J].Surface and Coatings Technology,2001(146-147):1. |
| [8] | Goward G W;Boon B H.Mechanism of formation of diffusion aluminide coatings on nickel-based superalloy[J].Oxidation of Metals,1971(03):475. |
| [9] | Lamesle P.;Steinmetz J.;Alperine S.;Steinmetz P. .PALLADIUM-MODIFIED ALUMINIDE COATINGS - MECHANISMS OF FORMATION[J].Journal of the Electrochemical Society,1995(2):497-505. |
| [10] | Lamesle P;Steinmetz P;Steinmetz J.Influence of palladium on diffusion processes in the B2 NiAl phase[J].Materials Science Forum,1997(251-254):163. |
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