Fracture toughness determination and microstructure investigation of a B4C–NanoTiB2 composite with various volume percent of Fe and Ni additives

Effects of ZrB2 contents on the mechanical properties and thermal shock resistance of B4C–ZrB2 ceramics

“…However, it should be noted that, although BZ4 had the highest DT c , its initial room temperature strength is relatively low and the residual strength was also relatively low. Even if the DT c for BZ4 is high, it is not believed to be suitable for engineering applications owing to its low room temperature and low residual strength [1][2][3]. Therefore, we think BZ3 ceramic not only has optimal initial room temperature strength but also has a high DT c , indicating an optimal thermal shock resistance.…”

“…According to Eqs. (1) and (2), it is therefore believed that BZ4 had the highest thermal stress damage resistance parameter, R IV , which also indicates the best thermal shock resistance among all these as-prepared B 4 C-ZrB 2 ceramics. Figs.…”

“…Carbide boride (B 4 C) is a promising candidate material for a wide range of engineering applications, such as nozzles for sand blasting [1], personnel body armor [2], nuclear reactors [3] and industrial cutting/grinding tools [4,5], owing to its low density, very high hardness, high neutron absorption, high bending strength and extremely high resistance to wear.…”

Boron Carbide Based Ceramic Composites Hot Pressed With Aluminium Additive

“…However, the sintering at temperatures above 2000 °C causes the particle coarsening in ceramic compacts [5,13]. Using fine powder, adding of sintering additives and application of pressure at sintering allows decreasing of sintering temperature [12,[14][15][16][17][18][19]. One of the major disadvantages of B4C is its low fracture toughness, which have to be improved for successful applications of boron carbide based ceramics [17,20].…”

“…Choosing of suitable composite systems permits creation of new phases in situ during sintering. Sintering additives in form of some elements (such as Al, Hf, Ti, B, C), and compounds (such as Al2O3, HfO2, TiO2, ZrO2, Si3N4, TiC, W2B5) are used at fabrication of in situ sintered B4C based ceramic composite materials [4,14,15]. They improve densification and influence the microstructure and mechanical properties of sintered compact because of creation of new secondary phases.…”