研究了活性元素Pd对高温合金K17表面上低压气相沉积(LPGD)渗铝工艺的影响.结果表明,在合金表面预沉积Pd-20%lNi合金后,在950℃和1 050℃渗铝制备铝化物涂层,与未经过电镀处理的样品相比,其渗铝速度得到了提高,形成铝化物涂层的动力学在950℃时符合抛物线规律,而在1 050℃时则近似线性关系."S"渗铝量对总渗铝量的比例不容忽视,在950℃时为33%左右,和渗铝工艺有关,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] | 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. |
| [3] | Goebel M .Interdiffusion between the platinum-modified aluminide coating RT22 and nikel-based singlephase superalloys at 1 000 and 1 200 ℃[J].Fuel and Energy Abstracts,1995,36:283-288. |
| [4] | 郭建亭,任维丽,周继扬.稀土元素在金属间化合物（铝化物）中的作用[J].材料工程,2002(01):36-39,43. |
| [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,2001,148:140-152. |
| [7] | Puris A L;Warnes B M .The effects of platinum concentration on the oxidation resistance of superalloys[J].Surface and Coatings Technology,2001,146-147:1-15. |
| [8] | Maurice C.The potential for nonostructured materials in gas turbine engines[J].Nonostructured Materials,1995(06):997-1002. |
| [9] | 王冰 .镍基高温合金MCrAlY防护涂层腐蚀行为[D].中国科学院金属研究所,2001. |
| [10] | 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. |
| [11] | Lamesle P;Steinmetz P;Steinmetz J .Influence of palladium on diffusion processes in the B2 NiAl phase[J].Materials Science Forum,1997,251-254:163-174. |
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