热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/asm.cp.itsc2021p0623

Nicholas Pocquette, H. Yeom, Hemant Agiwal, F. Pfefferkorn, K. Sridharan, K. Ross, J. Kessler, Gary Cannel

引用次数: 0

Cold Spray Sn Coating on the Carbon Fiber Reinforced Polymer 碳纤维增强聚合物的冷喷涂镀锡

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/asm.cp.itsc2021p0075

Jiayu Sun, K. Yamanaka, A. Chiba, Y. Ichikawa, Hiroki Saito, K. Ogawa

引用次数: 3

Cavitation Resistance of Coatings with a Metastable Austenite Structure 亚稳奥氏体结构涂层的抗空化性能

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/ASM.CP.ITSC2021P0290

Y. Korobov, H. Alwan, Filippov, N. Soboleva, V. Sirosh, A. Makarov, S. Estemirova

引用次数: 0

Principle and Practice to Achieve Improvements in TBC Thermal Cycle Lifetime 提高TBC热循环寿命的原理与实践

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/asm.cp.itsc2021p0066

He Jianhong, Sharobem Timothy, Naixie Zhou, G. Dwivedi

{"title":"Principle and Practice to Achieve Improvements in TBC Thermal Cycle Lifetime","authors":"He Jianhong, Sharobem Timothy, Naixie Zhou, G. Dwivedi","doi":"10.31399/asm.cp.itsc2021p0066","DOIUrl":"https://doi.org/10.31399/asm.cp.itsc2021p0066","url":null,"abstract":"\u0000 As a critical technology; thermal barrier coatings (TBC) have been used in both aero engines and industrial gas turbines for a few decades; however; the most commonly used MCrAlY bond coats which control air plasma sprayed (APS) TBC lifetime are still deposited by the powders developed in 1980s. This motivates a reconsideration of development of MCrAlY at a fundamental level to understand why the huge efforts in the past three decades has so little impact on industrial application of MCrAlY alloys. Detailed examination of crack trajectories of thermally cycled samples and statistic image analyses of fracture surface of APS TBCs confirmed that APS TBCs predominately fails in top coat. Cracks initiate and propagate along splat boundaries next to interface area. TBC lifetime can be increased by either increasing top coat fracture strength (strain tolerance) or reducing the tensile stress in top coat or both. By focusing on the reduction of tensile stress in top coats; three new bond coat alloys have been designed and developed; and the significant progress in TBC lifetime have been achieved by using new alloys. Extremely high thermal cycle lifetime is attributed to the unique properties of new alloys; such as remarkably lower coefficient of thermal expansion (CTE) and weight fraction of β phase; absence of mixed / spinel oxides; and TGO self repair ability; which cannot be achieved by the existed MCrAlY alloys.","PeriodicalId":70745,"journal":{"name":"热喷涂技术","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87147707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel Powder Modification Method for the Cold Spray of Hard Steels 硬质钢冷喷涂粉末改性新方法

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/ASM.CP.ITSC2021P0603

D. Poirier, Y. Thomas, B. Guerreiro, M. Martin, M. Aghasibeig, E. Irissou

引用次数: 1

Enhanced Antibacterial Properties of Copper Surfaces Using Cold Spray Shot Peening 冷喷丸强化铜表面的抗菌性能

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/ASM.CP.ITSC2021P0268

M. Razavipour, Naveen Singh, B. Jodoin, Mayte Gonzalez, E. Alarcon, J. Villafuerte

{"title":"Enhanced Antibacterial Properties of Copper Surfaces Using Cold Spray Shot Peening","authors":"M. Razavipour, Naveen Singh, B. Jodoin, Mayte Gonzalez, E. Alarcon, J. Villafuerte","doi":"10.31399/ASM.CP.ITSC2021P0268","DOIUrl":"https://doi.org/10.31399/ASM.CP.ITSC2021P0268","url":null,"abstract":"\u0000 Metal surface characteristics play a significant role in interacting with their biological environment. Copper surfaces have been identified for their antimicrobial properties. Improvement of antibacterial and antiviral performances can be tailored by surface microstructure modification. Severe plastic deformation is an effective surface modification procedure to improve the mechanical performance of metal surfaces. This technique can be adapted to obtain surface grain refinement and induce surface roughness. In this work, cold spray shot peening is used to modify copper substrate surfaces and study the effects on their antibacterial properties. To modify the grain structure of copper, different shot-peening parameters were examined. The surface roughness and microstructure were investigated by employing optical and scanning electron microscopy. The bactericidal activity of copper substrates after shot peening treatment is discussed and a comparison between the bacterial load on treated (shot-peened surface and cold sprayed copper coating) and untreated surfaces (as-received) is provided. Testing of the surfaces after their exposure to the biological environment demonstrated improved microbial inactivation performances for surfaces that had undergone grain refinement without exceeding a certain roughness value.","PeriodicalId":70745,"journal":{"name":"热喷涂技术","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79845160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Rheological Characteristics and Stability of Water-Based YSZ Suspensions on the Morphology of Plasma Sprayed Thermal Barrier Coatings 水基YSZ悬浮液流变特性和稳定性对等离子喷涂热障涂层形貌的影响

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/asm.cp.itsc2021p0001

M. Yaghtin, A. Yaghtin, Z. Tang, T. Troczynski

引用次数: 0

A Novel Modeling Method to Study the Oxide Layer Effect on Metallic Bonding in Cold Gas Dynamic Spray Process 一种研究冷气体动态喷涂过程中氧化层对金属结合影响的新型建模方法

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/asm.cp.itsc2021p0235

S. Rahmati, B. Jodoin, R. Veiga, A. Zúñiga

引用次数: 1

Effect of 316L Stainless Steel Powder Characteristics on Selective Laser Melting Process 316L不锈钢粉末特性对选择性激光熔化工艺的影响

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/ASM.CP.ITSC2021P0274

Du Kaiping, Lin Shengfeng, Shen Jie, Pi Ziqiang, Chen Xing

{"title":"Effect of 316L Stainless Steel Powder Characteristics on Selective Laser Melting Process","authors":"Du Kaiping, Lin Shengfeng, Shen Jie, Pi Ziqiang, Chen Xing","doi":"10.31399/ASM.CP.ITSC2021P0274","DOIUrl":"https://doi.org/10.31399/ASM.CP.ITSC2021P0274","url":null,"abstract":"\u0000 The product quality of selective laser melting (SLM) is closely related to the alloy powder characteristics, including the size distribution and the oxygen content. In this work, the 316L stainless steel powder was prepared by a vacuum atomization furnace and sieved into a normal-sized distribution range from 15 to 53 μm with a median diameter of 37.4 μm, and a fine-sized distribution range from 10 to 38 μm with a median diameter of 18.9 μm. Then they were mixed with each other in different proportions. The results show that, under the condition of the same SLM parameters, the SLM part, with adding a large amount of fine-sized powder, has a lower density and strength, as well as more holes and spheroidized particles, compared with the SLM part with adding a small amount of finer-sized powder. Furthermore, the 316L stainless steel powder with a high oxygen content was prepared by a non-vacuum atomization furnace. Although the 316L stainless steel powder with a high oxygen content can be evenly spread in the SLM process, the surface layer of the powder is easy to form an oxide film during the cooling and solidification of powder inside the molten pool. Under the action of thermal stress, the small crack forms and expands along the oxide film, eventually leading to large cracks inside the melt channel.","PeriodicalId":70745,"journal":{"name":"热喷涂技术","volume":"113 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72878440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure and Ablation Behavior of Very Low-Pressure Plasma Sprayed ZrB2-Based Coatings 极低压等离子喷涂zrb2基涂层的组织与烧蚀行为

热喷涂技术 Pub Date : 2021-06-15 DOI: 10.31399/ASM.CP.ITSC2021P0741

Di Wang, Xiao-Tao Luo, Chang-jiu Li

引用次数: 0

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