Facile preparation of BN coatings on graphite substrates and their binding strength
Facile preparation of BN coatings on graphite substrates and their binding strength
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石墨基材上 BN 涂层的简便制备及其结合强度
DOI：
10.1016/j.ceramint.2022.10.144
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发表时间：
2022-10
影响因子：
5.2
通讯作者：
Jialin Sun
中科院分区：
文献类型：
--
作者：
Haixu Li;Xiaoguang Liu;Tiannan Jiang;Tingxuan Li;Junsheng Wang;Bin Li;Wendong Xue;Shubin Ren;Jialin Sun
为了降低石墨基BN涂层的固化温度并获得良好的结合强度，设计了一种合适的Al(H2 PO4)3粘结剂，其中以MgAl2 O4为固化剂，聚乙烯醇(PVA)为分散剂。X射线衍射仪、扫描电子显微镜、透射电子显微镜和差示扫描量热分析表明，成功地获得了所需的结合相AlPO4，其中，MgAl2O4和PVA协同作用，将固化温度降低到70~100℃，促进了AlPO4的形成。这种优化的粘结剂可能与BN薄片上的-NH2和-OH基团形成氢键。它还可能与石墨衬底上的-OH和-COOH基形成氢键，以确保如划痕试验所建议的5.5N(∼22 Mpa)的最佳结合强度。这项工作对Al(H2 PO4)3的固化化学以及BN片、AlPO4粘结相与石墨基片之间的结合机理有了更好的理解。
To decrease the curing temperature and achieve excellent binding strength of BN coatings on graphite substrates, a proper Al(H 2 PO 4 ) 3 binder has been carefully designed where MgAl 2 O 4 and poly vinyl alcohol (PVA) were used as the curing agent and the dispersant, respectively. XRD, SEM, TEM and DSC showed that the desired binding phase AlPO 4 had been successfully obtained, where MgAl 2 O 4 and PVA worked synergistically to lower the curing temperature down to 70–100 °C and promote the formation of AlPO 4 . Such optimized binder might have formed hydrogen bond with –NH 2 and –OH groups on the BN flakes. It might also form hydrogen bond with-OH and –COOH groups on graphite substrates to ensure an optimal binding strength of 5.5 N (∼22 MPa) as suggested by the scratch tests. This work affords a better understanding on the curing chemistry of Al(H 2 PO 4 ) 3 and the binding mechanism between BN flakes, AlPO 4 binding phases and graphite substrates.
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影响因子：
3.1
作者：
Jianfeng Huang;G. Zhu;L. Cao;Jianpeng Wu;H. He
通讯作者：
Jianfeng Huang;G. Zhu;L. Cao;Jianpeng Wu;H. He
DOI：
--
发表时间：
1991-08
期刊：
--
影响因子：
--
作者：
신화우;안세민;정동훈;강태욱;이광표
通讯作者：
신화우;안세민;정동훈;강태욱;이광표
DOI：
10.3390/ma13214752
发表时间：
2020-10-23
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
José N;Ahmed H;Miguel B;Luís E;Jorge B
通讯作者：
Jorge B
影响因子：
5.4
作者：
Randall, NX;Favaro, G;Frankel, CH
通讯作者：
Frankel, CH
DOI：
10.1016/j.calphad.2019.03.008
发表时间：
2019-06
期刊：
Calphad
影响因子：
--
作者：
Soumya Sridar;Ravi Kumar;K. C. Kumar
通讯作者：
Soumya Sridar;Ravi Kumar;K. C. Kumar