团聚粉末制备工艺对冷喷涂Ti2AlC沉积的影响

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	团聚粉末制备工艺对冷喷涂Ti2AlC沉积的影响
其他题名	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
发表期刊	中国表面工程
ISSN	1007-9289
卷号	31.0 期号:004 页码:140-147
摘要	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。
其他摘要	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.
关键词	Ti2AlC涂层冷喷涂水热处理团聚
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:6309535
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/152466
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.中国科学技术大学
推荐引用方式 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.