Electromotive force measurements in the combustion wave front during layer-by-layer surface laser sintering of exothermic powder compositions

Abstract

Electric potentials arise between the combustion wave front and final products during layer-by-layer surface laser sintering of exothermic powder compositions (Ni-Ti, Ni-Al, Ti-Al). By using an analog-digital-analog converter to control the laser movement and hence the exothermic reaction itself, we show that near optimal conditions can be obtained for the formation of layered 3D articles. Comparative results of the structural-phase transformations that occur during laser-controlled SHS in related reaction-capable compositions are also presented.

Augmentation of DMLS Biomimetic Dental Implants with Weight-Bearing Strut to Balance of Biologic and Mechanical Demands: From Bench to Animal

“…Several methods have been proposed to produce porous metal structures [4,13]. More advanced techniques that have the capability of controlling the external and internal structure are additive manufacturing 3D-printing procedures including electron beam melting [14], selective laser melting [15], direct metal deposition [16], and selective laser sintering [17]. In this study, direct metal laser sintering of pre-alloyed Ti 6 AlV 4 fine powder was used to additively manufacture the dental implants.…”

Laser-controlled intermetallics synthesis during surface cladding

“…Among other things, the originality of our approach consists in the fact that the LI is not just reduced to an additional and precise thermal energy input, as in cases for the LPASS and LACS [7,8]. A special frequency and amplitude selection of the external field with respect to the natural oscillation frequencies of the "powder mixture + synthesized sample" system, can initiate a number of phenomena of the resonance nature.…”

“…Experimental heat situation studies in the LI area for exothermal powdered mixtures (Section 11.3) [13,14] and a detection of electromotive force occurrence on the combustion front [8] indicate that we have a deal with "laser-controlled" hightemperature syntheses (LHS) of new chemical compounds (more information on this Sources: [9,10].…”

“…The varying character of the D change under the increase of the laser energy input A should be noted. [8] concerning the fractal dimension of pores under SLS/M of pure titan. also Figure 11.2d).…”

“…also Figure 11.2d). Thus, it was shown that fractal dimension is a structure-sensitive parameter characterizing the degree of self-similarity of irregularities of different sizes [8]. [8] concerning the fractal dimension of pores under SLS/M of pure titan.…”