Instrumented microindentation – a versatile technique in the field of wood science and technology

Petrič, Marko (author)

Hardness is an important mechanical property of wood or other wood-based materials and it is also very important in the case of wood coatings. Different indentation methods for measurements of hardness and other mechanical properties have been utilised already for a long time. In the last 50 years the instrumented indentation was developed. Here, an indenter tests the surface of a specimen with a controlled load and movement, in order to assess its mechanical properties. Three ranges of instrumented indentation tests are distinguished. In the macro range, the force is higher than 2 N, in the micro range it is below 2 N and the depth of indentation must exceed 0.2 μm. When the indentation depth is lower than 0.2 μm, the indentation technique is called nanoindentation. There can be found thousands of scientific papers about applications of instrumented nanoindentation in research of a large variety of materials. Instrumented microindentation remained somehow in the shadow of nanoindentation, but yet, it is a highly versatile technique with potentials to study various (micro)mechanical properties. In this review, examples of possible applications of instrumented microindentation are presented, with a focus on investigations of wood, wood-based composites, surface coated wood and polymeric films. In the second part of this paper, as an illustration, investigations of a self-healing wood paint are shown. The cyclic method and a single-load indentation confirmed the different mechanical properties and good scratch resistance of the self-healing paint.

• Language: English
• Work type: Article
• Typology: 1.08 - Published Scientific Conference Contribution
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 13 str.
• Numbering: Vol. 1298, [št. članka] 012008
• PID: 20.500.12556/RUL-153459
• UDC: 630*8
• ISSN on article: 1757-899X
• DOI: 10.1088/1757-899X/1298/1/012008
• COBISS.SI-ID: 179827971
• Publication date in RUL: 08.01.2024

Record is a part of a journal

• Title: IOP conference series. Materials science and engineering
• Shortened title: IOP conf. ser., Mater. sci. eng.
• Publisher: IOP Publishing
• ISSN: 1757-899X
• COBISS.SI-ID: 1755733

Licences

• License: CC BY 3.0, Creative Commons Attribution 3.0 Unported
• Link: https://creativecommons.org/licenses/by/3.0/deed.en
• Description: You are free to reproduce and redistribute the material in any medium or format. You are free to remix, transform, and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Secondary language

• Language: Slovenian
• Keywords: mikroindentacija, trdota, les, lesni kompoziti, samoobnovljivi premaz

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P4-0015-2020
• Name: Les in lignocelulozni kompoziti