Tungsten diboride
Aniani ʻeleʻele keʻokeʻo kālā.
Pākuʻi pili 10.77, kiko hoʻoheheʻe ma kahi o 2900 ℃.
Hoʻomaʻemaʻe ʻole i ka wai, hiki ke hoʻoheheʻe ʻia i ka wai aqua regia.
ʻO Boron a me tungsten pauma i hana hoʻomake ʻia i ke ana wela.

He wahi hoʻoheʻe kiʻekiʻe ʻo Tungsten boride, kiʻekiʻe paʻakikī, kūpaʻa kemika a me nā waiwai ākea. ʻAʻole ia he mea superhard hou wale nō, akā kiʻekiʻe pū kekahi me ka paʻakikī. He mea nui ʻole ia i ka pūʻali koa. He mau kiʻiona pae ʻo Tungsten boride, a he loli hoʻi ke ʻano o nā ʻāpana like ʻole. No nā makahiki he 50 a ʻoi aku, ua manaʻo ʻia ʻo ka boride kiʻekiʻe ʻo tungsten ʻo WB4, kahi nona ka ʻekolu dimensional grid of boron atoms. Ua aʻo ʻōnaehana ʻia ka thermodynamic stable a me nā pono mechanical o nā ʻāpana kūpono o ka ʻōnaehana tungsten carbide ma o ka hoʻohui ʻana i ka helu mua ʻana me ka paʻa o ka thermodynamic:

ʻO ka boride kiʻekiʻe loa no ka ʻike ʻike tungsten e pono ai WB3 i haku ʻia me nā ʻāpana boron planar 2-d, ʻaʻole ʻo WB4 i haku ʻia o nā grids atoma boron ʻekolu dimensional.
ʻIke ʻia ka hoʻonui ʻana o ka modulus shear me ka hoʻoliʻiliʻi o kāna hana i ka ʻōnaehana boride o tungsten, e hōʻike nei e pili kokoke ana nā ʻenehana i kā lākou kūpaʻa thermodynamic.
Ma muli o kona ʻano ʻenekini, uila a me nā pono uila, ua hoihoi nui ka tungsten boride i ka noiʻi maʻamau a me ka noi ʻana o ka ʻepekema waiwai.
Ma muli o ke koina liʻiliʻi o ka WB2 diffusion coefficient, i kēia manawa, loaʻa ke synthesity o ka tungsten diboride nui ma o ka sinter ma lalo o ke kiʻekiʻe o ka mahana a me ke kaomi. Ma ka ʻaoʻao ʻē aʻe, no ka mea, evaporates ʻo B i nā mahana wela. No laila, ʻo ka hoʻomākaukau pololei ʻana o nā mea palaka WB2 me ka paukū tungsten a me ka pauma boron he paʻakikī e kaohi i ka ʻike boron, a me nā borides haʻahaʻa (e like me W2B) i hoʻokumu ʻia i ke kaʻina hana hewa, no laila ʻo nā mea poloka paʻa me WB2 ke ʻano nui. hiki ʻole ke kiʻi loa ʻia.
Kahua Noi:
ʻAʻahu - hoʻopale pale a me ke kiʻi ʻoniʻoni semiconductor no ka lole - nā ʻāpana kūpaʻa.