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Processable ceramic/metal gradient structure material and preparation method thereof
The invention relates to a machinable ceramic/metal gradient structure material and a preparation method thereof.The ceramic material comprises AIN and BN, the metal material comprises high-melting-point metal Mo, and the method comprises the following steps: mixing needed metal and ceramic powder according to designed gradient components, the number of gradient layers and the content of all the components in each layer to obtain raw materials of all the gradient layers; stacking the raw materials of each gradient layer, pressing and forming to enable the mass fraction of the ceramic powder tobe in continuous gradient change from inside to outside in an axial symmetry manner, and combining powder metallurgy with spark plasma activated sintering to obtain the ceramic material with the Vickers hardness of more than 9 GPa, the fracture toughness of more than 4.5 MPa.m<1/2>, good processability, the helium leakage rate of less than 1*10<11> Pa.m<3>/s and the bending strength of more than400 Mpa. According to the ceramic/metal gradient structure material with the specific resistance larger than 8*10<6> omega.cm, material overall densification and ceramic surface metallization are achieved, ceramic/metal connection is facilitated, the corrosion resistance, the sealing performance and the stability of the material are improved, and the machinable performance of the material is further enhanced on the basis of the ceramic/metal gradient structure material.
本发明涉及一种可加工的陶瓷/金属梯度结构材料及其制备方法，陶瓷材料包括AIN和BN，金属材料包括高熔点金属Mo，方法包括：按照设计的梯度组分、梯度层数及每层中各组分含量将所需的金属、陶瓷粉末混合，得到各梯度层原料，堆叠各梯度层原料并压制成形，使陶瓷粉体质量分数沿轴向对称从内至外在100‑0％之间呈连续梯度变化，利用粉末冶金结合放电等离子活化烧结，制得维氏硬度＞9GPa，断裂韧性＞4.5MPa·m1/2，可加工性能良好且氦漏率＜1×10‑11Pa·m3/s，抗弯强度＞400Mpa，电阻率＞8×106Ω·cm的陶瓷/金属梯度结构材料，实现了材料整体致密化和陶瓷表面金属化，有助于陶瓷/金属连接，提高材料耐腐蚀性、密封性及稳定性，并在此基础上进一步加强了其可加工性能。
Processable ceramic/metal gradient structure material and preparation method thereof
The invention relates to a machinable ceramic/metal gradient structure material and a preparation method thereof.The ceramic material comprises AIN and BN, the metal material comprises high-melting-point metal Mo, and the method comprises the following steps: mixing needed metal and ceramic powder according to designed gradient components, the number of gradient layers and the content of all the components in each layer to obtain raw materials of all the gradient layers; stacking the raw materials of each gradient layer, pressing and forming to enable the mass fraction of the ceramic powder tobe in continuous gradient change from inside to outside in an axial symmetry manner, and combining powder metallurgy with spark plasma activated sintering to obtain the ceramic material with the Vickers hardness of more than 9 GPa, the fracture toughness of more than 4.5 MPa.m<1/2>, good processability, the helium leakage rate of less than 1*10<11> Pa.m<3>/s and the bending strength of more than400 Mpa. According to the ceramic/metal gradient structure material with the specific resistance larger than 8*10<6> omega.cm, material overall densification and ceramic surface metallization are achieved, ceramic/metal connection is facilitated, the corrosion resistance, the sealing performance and the stability of the material are improved, and the machinable performance of the material is further enhanced on the basis of the ceramic/metal gradient structure material.
本发明涉及一种可加工的陶瓷/金属梯度结构材料及其制备方法，陶瓷材料包括AIN和BN，金属材料包括高熔点金属Mo，方法包括：按照设计的梯度组分、梯度层数及每层中各组分含量将所需的金属、陶瓷粉末混合，得到各梯度层原料，堆叠各梯度层原料并压制成形，使陶瓷粉体质量分数沿轴向对称从内至外在100‑0％之间呈连续梯度变化，利用粉末冶金结合放电等离子活化烧结，制得维氏硬度＞9GPa，断裂韧性＞4.5MPa·m1/2，可加工性能良好且氦漏率＜1×10‑11Pa·m3/s，抗弯强度＞400Mpa，电阻率＞8×106Ω·cm的陶瓷/金属梯度结构材料，实现了材料整体致密化和陶瓷表面金属化，有助于陶瓷/金属连接，提高材料耐腐蚀性、密封性及稳定性，并在此基础上进一步加强了其可加工性能。
Processable ceramic/metal gradient structure material and preparation method thereof
一种可加工的陶瓷/金属梯度结构材料及其制备方法
CHEN FEI (author) / WU YUEQI (author) / XU LI (author) / JIA MINGYONG (author) / SHEN QIANG (author) / LI HUI (author) / XUE QING (author)
2020-12-08
Patent
Electronic Resource
Chinese
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