Hydrostatic pressing of a mixture of titanium diboride and titanium carbide powders
| Autor: | V. A. Yunak, R. E. Murashko, L. I. Struk, T. A. Bosatina, V. N. Sumarokov, V. V. Borisenko, S. A. Shvab |
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| Rok vydání: | 1978 |
| Předmět: |
Pressing
Titanium carbide Materials science Metallurgy Metals and Alloys Sintering Condensed Matter Physics law.invention Pressure range chemistry.chemical_compound chemistry Density distribution Mechanics of Materials law Materials Chemistry Ceramics and Composites Hydrostatic equilibrium Titanium diboride Powder mixture |
| Zdroj: | Soviet Powder Metallurgy and Metal Ceramics. 17:317-320 |
| ISSN: | 1573-9066 0038-5735 |
| DOI: | 10.1007/bf00802219 |
| Popis: | 1. The process of hydrostatic pressing of a titanium diboride + 20% titanium carbide powder mixture is described by a logarithmic dependence of its relative volume on pressing pressure. The pressing of parts should be performed under pressures below 3000 kgf/cm2 in order to prevent the appearance of overpressing cracks. The optimum pressing pressure is 1500 kgf/cm2, which gives rise to the least elastic aftereffect. 2. By subjecting the mixture to vacuum treatment before pressing it is possible to increase the density of compacts by 1.5% in the pressure range 1500–2500 kgf/cm2 and decrease the probability of stratification. 3. Holding under a pressure of 2000 kgf/cm2 for 1–3 min enables the density of compacts to be increased by 1.5%. 4. High-temperature sintering leads to a marked increase in density, by 25–28%; sintered specimens have a residual porosity of 2–5%. 5. Hydrostatic pressing enables large-sized parts of complex three-dimensional shape with an even density distribution to be produced from titanium diboride powder with 20% titanium carbide. |
| Databáze: | OpenAIRE |
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