Formation of yittrium oxide in cemented carbides |
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| Authors: | Xiaofeng Li Te Hu Bin Liu Congzhang Qiu Zhanyong Zhao |
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| Affiliation: | 1. College of Materials Science and Engineering, North University of China, Taiyuan, P.R. China;2. The State Key Laboratory of Powder Metallurgy, Central South University, Changsha, P.R. China;3. The State Key Laboratory of Powder Metallurgy, Central South University, Changsha, P.R. China;4. Changsha Advanced Material Industry Research Institute, Changsha, P.R. China |
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| Abstract: | Rare-earth (RE) elements are helpful in improving the mechanical properties of cemented carbides. In this work, the formation of Y2O3 in functionally graded cemented carbides is investigated using transmission electron microscopy. The results indicate that Y2O3 can stabilize the Co phase with the face-centred cubic structure (α-Co), since it has a cubic structure similar to the high-temperature Co phase. The α-Co phase has a higher plasticity than ε-Co, and this suggests a possible mechanism for the role of RE elements in toughening cemented carbides. |
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| Keywords: | Cemented carbides rare-earth elements mechanical properties cobalt phases |
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