| 团聚粉末制备工艺对冷喷涂Ti2AlC沉积的影响 | |
| Alternative Title | Influences of Agglomeration Powder Preparation on Deposition of Cold-sprayed Ti2AlC Coating |
| 臧旭升(); 谢曦(); 沈艳芳(); 王吉强(); 柏春光(); 熊天英() | |
| 2018 | |
| Source Publication | 中国表面工程
 |
| ISSN | 1007-9289 |
| Volume | 31.0Issue:004Pages:140-147 |
| Abstract | 以热压烧结后球磨粉碎的Ti_2AlC亚微米粉末为原料,通过水热处理使其团聚成微米级粉末,并运用冷喷涂技术在Zr-4合金基体上沉积Ti_2AlC涂层。采用扫描电子显微镜、金相显微镜、XRD衍射仪、激光粒度分析仪等对Ti_2AlC颗粒和涂层微观结构进行表征;采用显微硬度仪和拉伸测试系统对Ti_2AlC涂层的基本力学性能进行测试;采用N2吸附法测涂层孔隙,采用电化学工作站测涂层的贯通孔隙。结果表明：对平均粒径〈0.3μm的Ti_2AlC粉末进行水热处理时,添加硫酸铵能够促进亚微米颗粒的团聚,团聚粉末的平均粒度可达到6μm。此粉末的冷喷涂特性最好,沉积的Ti_2AlC涂层厚度达到100μm,涂层中有微孔和介孔但没有贯通孔隙,涂层和基体结合强度达到了44MPa。 |
| Other Abstract | The Ti_2AlC submicron powders, fabricated by hot-pressing and ball milling, were hydrothermally treated. Then,Ti_2AlC coating was successfully deposited on Zr-4 substrate by cold spray using the powders. The microstructure of Ti_2AlC particles and as-sprayed coatings were characterized by scanning electron microscope（SEM）, optical microscopy（OM）, X-ray diffraction（XRD） and laser particle size analyzer. A micro hardness tester and a tensile-testing system were utilized to evaluate the mechanical properties of the Ti_2AlC coatings. The porosity of the coatings was measured by N_2 adsorption and the through-porosity of the coating was measured by an electrochemical workstation. The results show that the addition of （NH_4）_2SO_4 can promote the agglomeration of nanoparticles during hydrothermal treatment. The particle size of the Ti_2AlC powders increases from 0.3 μm to 6 μm after hydrothermal treatment with the addition of（NH_4）_2SO_4. Using the powders as feedstock, a dense Ti_2AlC coating of 100 μm thickness is deposited on Zr-4 substrate by cold spray. The bonding strength between the coating and substrate is measured to be 44 MPa. The coating is composed of micropores and mesopores, however,no through-porosity is noticed. |
| Keyword | Ti2AlC涂层 冷喷涂 水热处理 团聚 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:6309535 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/152466 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.中国科学院金属研究所 2.中国科学技术大学 |
| Recommended Citation GB/T 7714 | 臧旭升(),谢曦(),沈艳芳(),等. 团聚粉末制备工艺对冷喷涂Ti2AlC沉积的影响[J]. 中国表面工程,2018,31.0(004):140-147. |
| APA | 臧旭升,谢曦,沈艳芳,王吉强,柏春光,&熊天英.(2018).团聚粉末制备工艺对冷喷涂Ti2AlC沉积的影响.中国表面工程,31.0(004),140-147. |
| MLA | 臧旭升,et al."团聚粉末制备工艺对冷喷涂Ti2AlC沉积的影响".中国表面工程 31.0.004(2018):140-147. |
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