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U.S. Department of Energy
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Synthesis of new superhard materials and their application to cutting tools. Semi-annual technical report No. 4, 1 Oct 1975--31 Mar 1976. [Activated reactive evaporation]

Technical Report ·
OSTI ID:7318396
The process of Activated Reactive Evaporation is used to synthesize superhard materials like carbides, oxides, nitrides and ultrafine grain cermets. The deposits are characterized by hardness, microstructure, microprobe analysis for chemistry and lattice parameter measurements. The synthesis and characterization of TiC-Ni cermets and Al/sub 2/O/sub 3/ are given. High speed steel tool coated with TiC, TiC-Ni and TaC are tested for machining performance at different speeds and feeds. The machining evaluation and the selection of coatings is based on the rate of deterioration of the coating tool temperature, and cutting forces. Tool life tests show coated high speed steel tools having 150 to 300% improvement in tool life compared to uncoated tools. Variability in the quality of the ground edge on high speed steel inserts produce a great scatter in the machining evaluation data.
Research Organization:
California Univ., Los Angeles (USA). School of Engineering and Applied Science
OSTI ID:
7318396
Report Number(s):
AD-A-032856; UCLA-ENG-7659
Country of Publication:
United States
Language:
English