These two substances are not the same.
Boron carbide (boroncarbide), also known as tetraboron carbide, has a molecular formula of B4C and is usually a gray-black powder. Commonly known as artificial diamond, it is a boride with high hardness. It does not react with acid or alkali solutions, is easy to manufacture and is relatively cheap. Widely used in grinding, grinding, drilling, etc. of hard materials.
Borax, also called coarse borax, is a soft and light colorless crystalline substance. Borax has many uses, such as disinfectants, preservatives, water softeners, eye washes, soap additives, ceramic glazes and glass raw materials, etc. Borax also plays an important role in industrial production.