The Lanzhou Institute of Chemistry, Chinese Academy of Sciences, has achieved a breakthrough in high-temperature wear-resistant technology; a new type of ceramic achieves “negative wear.”-Hunan Electric _ Electric Power Wear-Resistant New Materials

The Lanzhou Institute of Chemistry, Chinese Academy of Sciences, has achieved a breakthrough in high-temperature wear-resistant technology; a new type of ceramic achieves “negative wear.”

Release time:

2022-07-28

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On May 13, 2025, the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, announced a major breakthrough in the field of high-temperature wear-resistant materials. The Ti₄MoSiB₂ quaternary layered boride ceramic material developed by the institute has successfully addressed the industry's longstanding challenge: the difficulty of simultaneously achieving both excellent mechanical properties and superior wear resistance in conventional materials.
By employing an M-element alloying strategy, this material features a unique out-of-plane chemically ordered layered structure and exhibits outstanding comprehensive performance over a wide temperature range—from room temperature up to 1000℃. The atomic-scale layered structure effectively guides crack deflection, significantly enhancing low-temperature fracture toughness; meanwhile, the thermal mismatch effect at grain boundaries alters the fracture mode, endowing the material with exceptional damage tolerance. Friction tests against the high-temperature alloy DD5 show that this material maintains excellent wear resistance across the entire temperature range. Moreover, oxygen vacancies formed at elevated temperatures give rise to TiO₂, which not only reduces friction but even leads to a phenomenon known as “negative wear.”
This research, led by doctoral student Li Hongbin and jointly conducted by researchers Su Yunfeng, Hu Tianchang, and others, has been published in the journal *Advanced Materials*. The development of this material not only enriches the fundamental theory of MAB-phase materials but also provides a brand-new solution for high-temperature, wear-resistant components in fields such as aerospace and advanced manufacturing.

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