The results of a study of the wear mechanism of diamond tools for turning aluminum-matrix composite materials (ACMs) hardened by Al
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O
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, SiC, and B
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C particles are presented. The study of the ...posterior surface topography of a diamond tool (ASPK-2) shows the presence of parallel scratches in the direction of the vector of the cutting speed; it is characteristic of abrasive wear fatigue. Research on the mass-transfer of the elements of the tool material into the chips of the treated material is carried out; it shows the presence of particles of the tool material of a size comparable to the ACM filler microparticles. The model of the abrasive-wear fatigue of a diamond tool during the turning of ACMs, considering the power of the impact of the reinforcement particles, the hardness of the tool depending on the temperature in the cutting zone, the abrasiveness, and the mass fraction of the dispersed particles reinforcing the matrix and tool geometry is proposed.
‘Passage’ denotes a portion or section of a written work. It also means “the act or an instance of passing of passing from one place, condition, etc., to another,” yet also “the permission, right, or ...freedom to pass.” It denotes an opening or entrance through which one may pass, hence a ‘passage way’ is “a way for passing through, or out of something.” Passage can also mean “a voyage by water or air from one point to another”, and “a progress or course, as of events.” Finally, passage also denotes “an interchange of communications, confidences, etc., between persons.” Passage captures much of what we have been describing in our exploration of the relationship between Being and Learning, and it is not surprising to find that the plurality of meaning that flows from this term also captures many of the events which unfold in the multilayered Allegory of the Cave.
