The Influence of Two Different Molding Methods on the Properties of Silicon Nitride-Bound Silicon Carbide Bricks
Silicon nitride-bonded silicon carbide refractories (Si₃N₄-SiC) possess excellent properties such as high strength, high temperature resistance, high thermal conductivity, and low coefficient of expansion, making them suitable for applications in marine pressurized boilers, particularly in areas subject to intense thermal shock, such as tuyeres, observation holes, and wall bricks. However, due to the irregular shape of furnace refractory bricks, uneven pressure transmission occurs during traditional machine pressing, leading to uneven density distribution in the finished product. When areas with lower density overlap with areas of concentrated thermal shock stress, these overlapping areas become weak points and crack initiation sites, reducing the refractory brick's thermal shock resistance. Therefore, achieving structural homogenization in irregularly shaped refractory brick products and improving their thermal shock resistance is crucial for enhancing their service life and saf...