Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultrahigh-temperature ceramic-metal composite material and preparation method thereof
The invention relates to the technical field of ultra-high-temperature ceramic materials, in particular to an ultra-high-temperature ceramic-metal composite material and a preparation method thereof.The method is prepared through a powder sintering method, the main steps include wet ball milling and plasma discharge sintering, and the method includes the following steps that HfC powder, HfN powder and TaSi2 powder are mixed and subjected to wet ball milling treatment, and the HfC powder, the HfN powder and the TaSi2 powder are subjected to plasma discharge sintering; mixed powder is obtained; and the mixed powder and a refractory metal net are stacked in a mold in a laminated mode, then sintering treatment is conducted, a transition layer with the refractory metal and the Hf element changing in a gradient mode is formed in the sintering process, and the ultra-high-temperature ceramic-metal composite material is obtained. According to the invention, ceramic matrix components are improved, TaSi2 is added as a sintering aid, and the TaSi2 is combined with the refractory metal net capable of preventing crack propagation, so that the density is improved, the strength, fracture toughness and ablation resistance of a sample are improved, and the problems of poor ablation resistance and mechanical properties of an existing ultrahigh-temperature ceramic material are solved.
本发明涉及超高温陶瓷材料技术领域，具体涉及一种超高温陶瓷‑金属复合材料及其制备方法，该方法通过粉末烧结法制备，主要步骤包括湿法球磨和等离子体放电烧结，包括以下步骤：将HfC粉体、HfN粉体和TaSi2粉体混合，进行湿法球磨处理，得到混合粉体；将混合粉体与难熔金属网叠层堆放于模具中，然后进行烧结处理，且在烧结过程中形成难熔金属与Hf元素梯度变化的过渡层，得到超高温陶瓷‑金属复合材料。本发明改进了陶瓷基体成分，加入TaSi2作为助烧结剂，并与能够阻止裂纹扩展的难熔金属网结合，在提高致密度的同时，提高样品的强度、断裂韧性和抗烧蚀能力，解决现有的超高温陶瓷材料存在的抗烧蚀能力和力学性能较差的问题。
Ultrahigh-temperature ceramic-metal composite material and preparation method thereof
The invention relates to the technical field of ultra-high-temperature ceramic materials, in particular to an ultra-high-temperature ceramic-metal composite material and a preparation method thereof.The method is prepared through a powder sintering method, the main steps include wet ball milling and plasma discharge sintering, and the method includes the following steps that HfC powder, HfN powder and TaSi2 powder are mixed and subjected to wet ball milling treatment, and the HfC powder, the HfN powder and the TaSi2 powder are subjected to plasma discharge sintering; mixed powder is obtained; and the mixed powder and a refractory metal net are stacked in a mold in a laminated mode, then sintering treatment is conducted, a transition layer with the refractory metal and the Hf element changing in a gradient mode is formed in the sintering process, and the ultra-high-temperature ceramic-metal composite material is obtained. According to the invention, ceramic matrix components are improved, TaSi2 is added as a sintering aid, and the TaSi2 is combined with the refractory metal net capable of preventing crack propagation, so that the density is improved, the strength, fracture toughness and ablation resistance of a sample are improved, and the problems of poor ablation resistance and mechanical properties of an existing ultrahigh-temperature ceramic material are solved.
本发明涉及超高温陶瓷材料技术领域，具体涉及一种超高温陶瓷‑金属复合材料及其制备方法，该方法通过粉末烧结法制备，主要步骤包括湿法球磨和等离子体放电烧结，包括以下步骤：将HfC粉体、HfN粉体和TaSi2粉体混合，进行湿法球磨处理，得到混合粉体；将混合粉体与难熔金属网叠层堆放于模具中，然后进行烧结处理，且在烧结过程中形成难熔金属与Hf元素梯度变化的过渡层，得到超高温陶瓷‑金属复合材料。本发明改进了陶瓷基体成分，加入TaSi2作为助烧结剂，并与能够阻止裂纹扩展的难熔金属网结合，在提高致密度的同时，提高样品的强度、断裂韧性和抗烧蚀能力，解决现有的超高温陶瓷材料存在的抗烧蚀能力和力学性能较差的问题。
Ultrahigh-temperature ceramic-metal composite material and preparation method thereof
一种超高温陶瓷-金属复合材料及其制备方法
HU LEI (Autor:in) / LI YUSHAN (Autor:in) / TAN FEIYU (Autor:in) / XUE MINTAO (Autor:in) / DING XIANGDONG (Autor:in)
09.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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