Scratch induced failure of plasma sprayed alumina based coatings

An Experimental Investigation of Al2O3-40% TiO2 Powder Amalgamated via Atmospheric Plasma Spray Coating onto SS316 Substrate and Parameter Optimization Using TLBO Algorithm

“…Orthogonal array experimental design proposed by Taguchi can be efficiently used to examine the effect of different input parameters on the critical performance characteristics linked output parameters through compact set of experiments [5]. In-depth understanding of the process, including the minimum, maximum, and current value of the parameter is required to decide the set of input parameters that are highly affecting a process as well as the levels at which these parameters should be varied [6].…”

Quantitative investigation of the adhesion strength between an SU‐8 photoresist and a metal substrate by scratch tests

“…Some methods are used to assess the film adhesion, such as the pull-off method, 4 peel method, 5 interfacial indentation test, 6 indentation test, 7 and scratch test. [8][9][10][11][12] During the scratch test, a diamond indenter is drawn across the film surface under an increasing load until film detachment occurs, where a critical load is used to assess the interfacial adhesion strength. 8 However, critical loads are strongly affected by various parameters, including the film thickness (t) and scratch speed, 13 and these fail to accurately characterize the interfacial adhesion strength.…”

“…(26) and (27) into eqs. (7)(8)(9)(10)(11)(12)(13) and then the insertion of these equations into eq. (14), r i,o represented by P and F in the film-substrate system was obtained.…”

New observations on scratch deformations of soda lime silica glass

“…The scratch tests provide a simple means to understand the deformation and material removal mechanisms during dynamic contact in metals [1], polymers [2] and brittle solids like glass and ceramics [3][4][5][6][7]. Of all these materials glass is the most brittle one.…”

“…That in turn demands very precise grinding and polishing of glass which is not possible without a very clear cut picture of the material removal mechanisms and their dependencies on the glass compositions as well machining parameters [6,7]. The single, double or multiple pass scratch tests are therefore conducted to simulate the material removal mechanisms for a truly wide variety of glass, ceramics, composites, thin films and coatings [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Depending on load both deformation and micro-fracture can happen during scratching of glass [8] and ceramics [9].…”