By E. A. Olevsky, Rajendra Bordia
This quantity is a part of the Ceramic Engineering and technological know-how continuing (CESP) series. This sequence features a number of papers facing concerns in either conventional ceramics (i.e., glass, whitewares, refractories, and porcelain tooth) and complicated ceramics. themes coated within the region of complicated ceramic contain bioceramics, nanomaterials, composites, stable oxide gas cells, mechanical homes and structural layout, complicated ceramic coatings, ceramic armor, porous ceramics, and more.Content:
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Additional info for Advances in Sintering Science and Technology: Ceramic Transactions
Frage Department of Materials Engineering, Ben-Gurion University of the Negev, P. 0. Box 653, BeerSheva 84105, Israel S. Dub Institute for Superhard Materials of the National Academy of Science of Ukraine Avtozavodskaya str. 2 Kiev 04074 Ukraine ABSTRACT The present communication is concerned with the effect of the carbon source on the microstructure and mechanical properties of reaction bonded boron carbide composites. % porosity with and without free carbon addition. The infiltrated composites consist of four phases namely the original boron carbide particles, the ternary Bi2(B,C,Si)3 compound, formed in the course of the infiltration process, ß-SiC and residual silicon.
Table 1 . 5 To see the consequences of a thermal gradient applied in the initial stage of sintering on the future densification of the material, a dilatometric study is realised for each section. A relatively low temperature of sintering is chosen (1450°C) in order not to be nearby to the theoretical density and then to mask the effects of gradient. Besides, the heating rate used is fast (20cC/min), in order to avoid the screening of the initial treatment effects. The dilatometric results (Figure 3) show a densification gain (compared to conventional sintering) when the sample is first pre-treated under thermal gradient.
Table 1. ZrN Pellet Density for Bimodal Distributions Sample Wt %44μ (G) Wt°/c, 10μ (g) 1 9 1 2 8 2 7 3 3 4 6 4 5 5 5 *Samples 1 and 2 were broken prior to p(g/cc) uniaxial pressed 71 70 71 69 68 isopressing. p(g/cc) isostatic pressed - 73 75 73 Advances in Sintering Science and Technology · 23 High Density Green Pellets of ZrN Fabricated by Particle Processing This work will also explore trimodal mixing of powders. 8% to 95% depending on the volume fraction of small, medium and large particles used.