Because of the technical complexity and high cost of the synthesis, HfC has a very limited use, despite its favorable properties such as high hardness (greater than 9 Mohs) and melting point.
bɪkˈʌz ʌvðə tˈɛknɪkəl kəmplˈɛksᵻɾi ænd hˈaɪ kˈɔst ʌvðə sˈɪnθəsˌɪs, ˌeɪtʃˈɛf sˈiː hɐz ɐ vˈɛɹi lˈɪmɪɾᵻd jˈuːs, dᵻspˈaɪt ɪts fˈeɪvɚɹəbəl pɹˈɑːpɚɾiz sˈʌtʃ ɐz hˈaɪ hˈɑːɹdnəs ɡɹˈeɪɾɚ ðɐn nˈaɪn mˈoʊz ænd mˈɛltɪŋ pˈɔɪnt.