Acoustical Investigation of Adhesion in Liquid Metal–Ceramic Interfaces

Abstract

In this paper, we briefly review and analyse results of an acoustical investigation of adhesion in metal-ceramic interfaces based on the determination of the slope parameter, which is defined by the linear correlation between the work of adhesion of various liquid metal-ceramic systems and the sound propagation velocity of plate acoustical wave in the corresponding metals. The dependence of values of the work of adhesion slope parameter for several ceramic materials on the acoustic impedances of the corresponding ceramics is examined. The obtained results permit the interpretation of the wave propagation nature in these interfaces according to the existence and the excess of the interfacial bonding.

Effect of Preliminary Irradiation of 321 Steel Substrates with High-Intense Pulsed Ion Beams on Scratch Test Results of Subsequently Deposited AlN Coatings

“…In order to assess the effect of HIPIB irradiation of the substrates on the tribological behavior of the AlN coatings, scratch tests were carried out, combined with the AE signal processing. In this research method, the AE signal peaks were associated with the initiation and propagation of cracks in the coatings under indenter forces (Fn) above limited levels [32,37,51,[87][88][89][90]. The intensity of the AE signal peaks was proportional to (i) the number of formed cracks and (ii) the number of broken interatomic bonds (the fractured coating volume).…”

“…On the metal substrates, the tribological characteristics of the coatings were investigated by scratch tests combined with processing of acoustic emission (AE) signals by the 'Micro-Scratch Tester MST-S-AX-0000 setup with a diamond indenter, similar to [47,51,[87][88][89][90]. The indenter radius was 100 µm.…”

Prediction of Adhesion Energy Terms in Metal/Ceramic Systems by Using Acoustic Parameters

“…The steps of the SAM approach, consist of determining SAW velocities of different modes, calculating acoustic materials signatures and deducing SAW velocities via fast Fourier transform (FFT) treatment of periodic V(z) signatures. The details of these steps can be found elsewhere [9][10][11].…”

“…In this study, we consider several metals (Au, Cu, Sn, Ga, and Ag) on a great number of ceramic substrates (AlN, Al [12], density (ρ C ), and Young's modulus (E C ) [13] are listed in Table 1. The simulation conditions are those usually used experimentally in the case of a reflexion scanning acoustic microscope (SAM) [9][10][11]: a half opening angle of the lens of 50°, an operating frequency f = 145 MHz and water as a coupling liquid whose wave velocity V liq equal to 1500 m/s and density ρ liq equal to 1000 kg/m 3 .…”