The disadvantages of molybdenum materials mainly include the following aspects:
1. High manufacturing cost: The manufacturing cost of molybdenum materials is relatively high, and it is difficult to manufacture large-sized molybdenum materials.
2. Difficult to process: Due to the high hardness and low toughness of molybdenum material, it is difficult to process into complex shaped parts.
3. Poor high-temperature oxidation performance: Molybdenum materials are prone to oxidation above 600 ℃, and measures such as coating are needed to control the high-temperature oxidation problem.
4. Poor low-temperature ductility: Molybdenum materials have poor ductility at low temperatures, and this problem needs to be solved through alloy strengthening and the addition of carbides.
5. Toxicity issue: Molybdenum compounds, especially molybdenum trioxide, have certain toxicity and may have negative effects on human health.