Preparation Method and Industrialization of NbC Ceramic Tujia Jar Tea Roast Tea Can by High Temperature Sintering

Abstract

As a widely loved beverage, tea requires using a roast tea can for roasting and brewing. The selection of materials for the roast tea can itself is crucial for maintaining the tea’s freshness and aroma. The study adopts niobium carbide as raw material, introduces nickel alloy and multi-layer graphene, and designs the preparation tools and processes of the materials. This can improve the mechanical and frictional wear properties of the materials used in Tujia jar tea and roasted tea cans, promoting roasted tea cans’ industrialization. To enhance the improvement effect of graphene on materials, microwave sintering technology is adopted in this study. Different sintering temperature schemes and multi-layer graphene content schemes are designed. The evaluation and characterization indicators of the mechanical and frictional wear properties of successfully prepared metal ceramic materials are described. The corresponding tools and their properties are clarified. When the sintering temperature was 1440 °C, the bending strength, Vickers hardness, and fracture toughness of the metal ceramic material are the best. When the content of multi-layer graphene was 0.75 wt.%, the material had better mechanical properties and can suppress grain growth. When the multi-layer graphene was 0 wt.%, the corresponding wear amounts of the four hardness on the grinding balls were 14.4 × 10^-6, 1.327 × 10^-6, 1.327 × 10^-6, and 34.59 × 10^-6 mm³/N·m, respectively. These were significantly higher than the wear amount when the multi-layer graphene was 0.75 wt.%. The addition of multi-layer graphene can improve the mechanical and frictional wear properties of materials, reduce wear, and provide material technology support for the industrialization of Tujia jar tea materials.