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Preparation method of silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder
The invention relates to a preparation method of a silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder. The silicon nitride-based self-lubricating ceramic cutter material comprises, by volume, 57-70% of micrometer silicon nitride, 5-15% of nanometer silicon nitride, 5-15% of micrometer titanium carbide, 3.2% of alumina, 4.8% of yttrium oxide, and 2-15% of alumina-coated hexagonal boron nitride. The preparation method comprises preparing alumina-coated hexagonal boron nitride composite powder with particle sizes of 4-12 micrometers, weighing micrometer silicon nitride, nanometer silicon nitride and micrometer titanium carbide, respectively preparing their suspension liquids, carrying out ultrasonic dispersion, carrying out mixing, adding alumina and yttrium oxide into the mixture, carrying out ultrasonic dispersion for 15-20min to obtain a composite suspension liquid, carrying out ball milling, adding the alumina-coated hexagonal boron nitride composite powder into the composite suspension liquid, carrying out ball milling, carrying out vacuum drying to obtain mixed powder and carrying out vacuum hot pressing sintering molding. The silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder can improve ceramic cutter mechanical properties and guarantee self-lubricating performances.
Preparation method of silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder
The invention relates to a preparation method of a silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder. The silicon nitride-based self-lubricating ceramic cutter material comprises, by volume, 57-70% of micrometer silicon nitride, 5-15% of nanometer silicon nitride, 5-15% of micrometer titanium carbide, 3.2% of alumina, 4.8% of yttrium oxide, and 2-15% of alumina-coated hexagonal boron nitride. The preparation method comprises preparing alumina-coated hexagonal boron nitride composite powder with particle sizes of 4-12 micrometers, weighing micrometer silicon nitride, nanometer silicon nitride and micrometer titanium carbide, respectively preparing their suspension liquids, carrying out ultrasonic dispersion, carrying out mixing, adding alumina and yttrium oxide into the mixture, carrying out ultrasonic dispersion for 15-20min to obtain a composite suspension liquid, carrying out ball milling, adding the alumina-coated hexagonal boron nitride composite powder into the composite suspension liquid, carrying out ball milling, carrying out vacuum drying to obtain mixed powder and carrying out vacuum hot pressing sintering molding. The silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder can improve ceramic cutter mechanical properties and guarantee self-lubricating performances.
Preparation method of silicon nitride-based self-lubricating ceramic cutter material containing alumina-coated hexagonal boron nitride composite powder
XU CHONGHAI (Autor:in) / MA JUN (Autor:in) / XIAO GUANGCHUN (Autor:in) / YI MINGDONG (Autor:in) / CHEN ZHAOQIANG (Autor:in) / CHEN HUI (Autor:in)
09.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2020