The W-Si ternary alloys own a longer oxidation life than W-Si binary alloys. The oxidation behavior of different ternary alloys is significantly lower compared to those of pure W and WSi13 alloys. In the temperature range of 600-1000°C, the oxidation rate of WSi₁₃Zr₁₃ alloy is only 0.16-0.27 times that of WSi₁₃ alloy. the oxidation rate of W-Si-Cr alloy is lower than that of WSi₉Y₁₃ alloy, while the oxidation rates of WSi₈Cr₁₂ and WSi₁₂Cr₇ alloys at 1000°C are only 0.25 and 0.023 times that of WSi₉Y₁₃ alloy, respectively. 0.25 and 0.023 times, respectively.

Analysis of latest tungsten market from Chinatungsten Online

The ferro tungsten and tungsten carbide powder prices in the Chinese market stabilize on April 20, 2023 when most market participants are waiting for the release of new guide prices from listed tungsten companies. 

W-Si binary alloys are mainly composed of Si and W-Si compounds. During oxidation behavior of W-Si alloys, the surface of the alloy is readily oxidized, producing a dense and continuous protective film of SiO₂. It will act as a diffusion barrier and delay further diffusion of oxygen into the alloy.

This week, China rare earth prices fell first and then rose. At the beginning of the week, due to the slightly increased supply of rare earth raw materials, the strong sentiment of downstream users to suppress prices and the weak demand, the prices of praseodymium, neodymium, dysprosium, terbium and NdFeB roughs fell.