Nevertheless, the planet’s dependence on China for the supply of rare earths happens to be a growing issue for world wide corporations, specially amidst the geopolitical tensions amongst the nation together with other industry giants such as the United States. Silicon nitride has high hardness and corrosion reisistance as a https://www.facebook.com/permalink.php?story_fbid=pfbid02jiwHc8rb8XoM8PPo4GYNg1DhJRpQiYL4ynt8NSxtnaEM33zEdPnXuYULBuWpacFhl&id=61560512640678&__cft__[0]=AZUDgS4LVgUAPgfPPyifPFicKB29cou-l2QgrxFSEfMO6390aX1FZ4tRGQlEkt1o2keeQ0MgMwKv59O0AhbycmxqjgsXWIAtOdGrLlvncIElf1HpA8EplDL-zYnZt09X8Ri2yikosojqKlygPtKSzFfmiifNigE3GaE4_IB4drUEAuCaWA7U9aaOWKNMw34ro5cyKhsHhXVN-sXs5eln3jhe&__tn__=%2CO%2CP-R