Possible alternatives to critical elements in coatings for extreme applications

E-MRS Fall Symposium I: Solutions for Critical Raw Materials Under Extreme Conditions

Grilli, Maria Luisa^1 ; Valerini, Daniele^2 ; Piticescu, Radu Robert^3 ; Bellezze, Tiziano^4 ; Yilmaz, Mehmet^5 ; Rinaldi, Antonio^1 ; Cuesta-López, Santiago^6,7 ; Rizzo, Antonella^2

ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Centre, Via Anguillarese 301, Roma

00123, Italy^1

ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Brindisi Research Centre, S.S. 7 Appia - km 706, Brindisi

72100, Italy^2

National RandD Institute for Nonferrous and Rare Metals, Biruintei Blvd. No. 102, Pantelimon

077145, Romania^3

Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Polytechnic University of Marche, Via Brecce Bianche 12, Ancona

60131, Italy^4

Department of Science Teaching, Faculty of K. K. Education, Atatürk University, Erzurum

25240, Turkey^5

ICCRAM, Int. Center for Critical Raw Materials and Advanced Industrial Technologies, Plz. Misael Banuelos, Burgos

09001, Spain^6

ICAMCyL Foundation, International Center for Advanced Materials and Raw Materials of Castilla y Leon, Cubillos del Sil (León)

24492, Spain^7

关键词: Coating performance;    Critical elements;    Extreme applications;    Extreme conditions;    Specific properties;    Substrate durability;    Superhard coatings;    Surface functionalisation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/329/1/012005/pdf
DOI  :  10.1088/1757-899X/329/1/012005

来源: IOP

【 摘 要 】

Surface functionalisation and protection have been used since a long time for improving specific properties of materials such as lubrication, water repellence, brightness, and for increasing durability of objects and tools. Among the different kinds of surface treatments used to achieve the required properties, the use of coatings is fundamental to guarantee substrate durability in harsh environments. Extreme working conditions of temperature, pressure, irradiation, wear and corrosion occur in several applications, thus very often requiring bulk material protection by means of coatings. In this study, three main classes of coatings used in extreme conditions are considered: i) hard and superhard coatings for application in machining tools, ii) coatings for high temperatures (thermal barrier coatings), and iii) coatings against corrosion. The presence of critical elements in such coatings (Cr, Y, W, Co, etc.) is analysed and the possibility to use CRMs-free substitutes is reviewed. The role of multilayers and nanocomposites in tailoring coating performances is also discussed for thermal barrier and superhard coatings.