Mechanical, thermal, and electrical properties of pressureless sintered SiC–AlN ceramics

Effect of AlN addition on the electrical resistivity of pressureless sintered SiC ceramics with B4C and C

“…As shown in Table 1, all of the specimens had high sintered densities with low residual porosities (≤2.2%) A survey of the published literature shows that process modeling of CMCs has been studied by a number of researchers. Processes that have been modeled include RMI, 15,16 CVD, 17,18 CVI, [19][20][21][22] and Sol-Gel Infiltration. 23 Impregnation of alumina matrix in eight-harness satin Nextel 610 fabric has been studied numerically in Ref.…”

“…As shown in Figure 1, the XRD patterns revealed two important phenomena with increasing AlN content: (1) increased 6H → 4H phase transformation, as indicated by a gradual decrease in the 6H [101]-peak intensity at ~34.1° and a simultaneous increase in the 4H [101]-peak intensity at ~34.8° and (2) the formation of SiC-AlN 2H ss , as indicated by a gradual shift in the SiC [100]-peak at 33.5° towards the 33.2° [100]-peak of 2H-AlN. 14,16 Figure 2 shows typical microstructures of SiC ceramics pressureless sintered with B 4 C, C, and 0-12 wt% AlN. The A0 specimen exhibited a relatively fine-grained microstructure with equiaxed SiC grains.…”

Mechanical properties of SiC‐C‐B4C composites with different carbon additives produced by pressureless sintering

“…26 The most important methods of SiC sintering are HP and pressureless sintering (solid state sinter and sintering in the presence of liquid phase) which are very useful. [34][35][36][37][38] The HP method is used less industrially due to high consumption costs and lack of production of large parts or complex shapes. 35 The pressureless sintering method has received much attention due to the llimitations of the HP method.…”

“…35 The pressureless sintering method has received much attention due to the llimitations of the HP method. 37,38 SiC sintering takes place in solid state or in the presence of liquid phase. 39 In the liquid phase sintering, the presence of the liquid phase facilitates mass transfer and reduces the sinter temperature; However, the components prepared using this method have a lower hardness than the solid phase.…”

“…The HP method is used less industrially due to high consumption costs and lack of production of large parts or complex shapes 35 . The pressureless sintering method has received much attention due to the llimitations of the HP method 37,38 . SiC sintering takes place in solid state or in the presence of liquid phase 39 .…”