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对（ｌ－×）（８０％Ｂ４ＣＣ－２０％ＳｉＣ）／ｘ Ｃ（体积分数）功能梯度材料的 ×＝０． ２， ０．４， ０．６， ０．８的各层 分别在２０００℃，２０ＭＰａ进行了热压，测定了各层的密度，线膨胀系数，弹性模量和抗弯强度等． 按线性成分分布函数的６层和１１层梯度材料热压后都出现了裂纹．采用了不同于幂函数的Ｓ 型成分分布函数设计，热压了１１层（×＝０．２～１．０）的功能梯度材料，其抗弯强度为２１６ＭＰａ，抗热震 性＞５００℃．
X = 0 for (l-) (80% B4CC-20% SiC) / xC (volume fraction) functionally graded material. 2, 0.4, 0.6, and 0.8 were hot-pressed at 2000 ° C and 20 MPa, respectively, and the densities, linear expansion coefficients, elastic modulus, and bending strength of the respective layers were measured. According to the linear composition distribution function of the 6 layers and 11 layers of gradient material after hot cracks have emerged. Using the S-component distribution function which is different from the power function, the functionally graded material with 11 layers (× = 0.2 ~ 1.0) was hot pressed with a flexural strength of 216 MPa and a thermal shock resistance of> 500 ℃.