Investigation of Mechanical and Tribological Properties of Materials in Micro and Nano Scale with Nano-Indenter and SPM Surface Science & Nano-Tribology Lab

MTS Nano Indenter XP Source:

Digital Instruments NanoScope IIIa SPM Source:

Adhesion Failure of Ink on Plastic Films Adhesion Strength Test: The Nano Indenter (MTS) with a conical- shaped diamond tip (90 , radius: 1  m) is used to scrape the surfaces of the samples under an increasing normal force The critical forces, at which the interface failed and the ink was peeled off the plastic film, reflects the adhesive strength. Adhesion: a measure of the strength of bonds between the ink and plastic substrate through the interface.

Different configurations of adhesion failure I II III IV V

(a)2-D color-scaled topographic image of a scratch made under an increasing force from 2.9mN to 3.1mN at the surface of an ink sample. (b)Profile along the bottom of the ditch. (c)3-D view of the topographic image. (d)Lateral force image taken simultaneously with the topographic image. A a cd b SPM analysis of adhesion failure

Hard-coated Polycarbonate Systems

SPM images of Mar and rough trough Sample A after scratch at 10mN and 20mN Scan Size: 80  m  80  m, Z-range: 400nm Sample A after scratch at 30mN Scan Size: 80  m  80  m, Z-range: 1000nm

SPM images of cracking and delamination Sample A after scratch at 40mN and 50mN Scan Size: 80  m  80  m, Z-range: 4000nm Sample A after scratch at 60mN Scan Size: 80  m  80  m, Z-range: 4000nm

Mold-In-Color Plastic Panels A1A2 Flow direction A3 B1B2B3 C1C2C3 Hardness of the plastic deviate little on different locations of the panel.

SPM phase images of sample A Before washing Scan Size: 5  m  5  m, Z-range: 45  After washing with IPA Scan Size: 5  m  5  m, Z-range: 45 

SPM phase images of sample B Before washing Scan Size: 5  m  5  m, Z-range: 45  After being rubbed with cotton Scan Size: 5  m  5  m, Z-range: 45 

Brass Soft Coating Hard Coating Brass 8  m Ni 0.25  m ZrNCoating 0.25  m Cr Organic/Inorganic coatings deposited on brass Brass substrate ZrN/Cr/Ni/Brass (traditional coatings) Organic/Inorganic Coatings for Hardware

M-1 (500  m  m)M-3 (500  m  m)M-2 (500  m  m) M-1 (z: 500 nm/div)M-2 (z: 500 nm/div)M-3 (z: 500 nm/div) Damage patterns in the real applications

Fatigue in rubber rings

E ASTERN M ICHIGAN U NIVERSITY

N ANO T RIBLOGY L ABORATORY