On subjecting the green samples of different thickness to microwave heating treatment of Fig. 1 the bulk density of more than 97% of theoretical density (TD) was recorded consistently. By conventional sintering such high densities are obtained only by giving a long soaking period at 1700°C.
It is understood that the cold treatment process tool refers to the termination point of martensitic transformation temperature drops below 0 ℃, after quenching tissue contains a large number of retained austenite, to make the residual austenite into martensite, the after quenching into cold continue cooling agent or a refrigerator in practice.
The time required for sintering has also been reduced: with the new microwave furnace 1800 with vacuum and protection gas, a large range of materials can be sintered rapidly. All furnace parts are easily replaceable without the need for special technical assistance.
The powder was then heated in a vacuum furnace at 800 °C (Fig.2a) for 30 min to remove the impurities and gases adsorbed in the mixture, followed by high pressure and high temperature treatment in a 6 × 14 MN cubic press (a hinge-type six-anvil hydraulic press, which is the main equipment used in China to produce high pressure). At the outset
201843"High Temperature Insulation Materials Market- Global Trends & Forecast to 2019," Regulation EC 1272/2008. San-Miguel, L. and Schumann, M., "Fiber Free Ceramic Insulation Foam for Extreme Temperatures-A New Generation of HSE Friendly Refractory Products with Multiple Application Possibilities," Refractories World Forum, August 2017 .
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