Fabrication of ZrB2–Zr cermet using laser sintering technique
Fabrication of ZrB2–Zr cermet using laser sintering technique
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DOI：
10.1016/j.matlet.2009.08.059
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发表时间：
2009-11
影响因子：
3
通讯作者：
Chen-Nan Sun;T. Baldridge;M. Gupta
中科院分区：
文献类型：
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作者：
Chen-Nan Sun;T. Baldridge;M. Gupta
激光烧结/熔化和感应加热技术的组合用于制造ZrB 2-Zr陶瓷-金属复合材料（金属陶瓷）的3-D结构，使用逐层沉积。结果表明，层间界面在重熔区附近包含约20µm厚的富Zr相。起始粉末混合物由30- 50重量%的Zr，其用于辅助ZrB 2颗粒的结合。烧结体的密度大于理论值的95%，显微硬度值高达16.0GPa。ZrB 2-Zr金属陶瓷可以通过增加连续Zr基体的韧性和抗冲击性来降低机械失效的可能性，同时保持ZrB 2颗粒提供的良好磨料特性。所提出的方法允许制造复杂形状的结构，并连接或修复由类似的超高温材料制成的物体。
A combination of laser sintering/melting and induction heating techniques is used to fabricate ZrB2–Zr ceramic–metal composite (cermet) 3-D structures using layer by layer deposition. It is shown that the interface between layers comprises an ~20µm thick Zr-rich phase near the remelted zone. The starting powder mixtures consist of 30–50wt.% Zr, which is used to assist binding of ZrB2particles. Sintered objects have densities >95% of theoretical values and have microhardness values up to 16.0GPa. ZrB2–Zr cermet may reduce the likelihood of mechanical failures by increasing toughness and impact resistance contributed from the continuous Zr matrix, yet preserve good abrasive characteristics provided by ZrB2grains. The proposed method allows fabricating complex-shaped structures, and joining or repairing objects made from analogous ultra-high temperature materials.