Mechanically Reinforced Artificial Enamel by Mg 2+ -Induced Amorphous Intergranular Phases
Amorphous intergranular phases in mature natural tooth enamel are found to provide better adhesion and could dramatically affect their mechanical performance as a structure reinforcing phase. This study successfully synthesized an amorphous intergranular phase enhanced fluorapatite array controlled...
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| Veröffentlicht in: | ACS nano 2022-07, Vol.16 (7), p.10422-10430 |
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| container_title | ACS nano |
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| creator | Li, Yidi Kong, Yang Xue, Bingyu Dai, Jialei Sha, Gang Ping, Hang Lei, Liwen Wang, Weimin Wang, Kun Fu, Zhengyi |
| description | Amorphous intergranular phases in mature natural tooth enamel are found to provide better adhesion and could dramatically affect their mechanical performance as a structure reinforcing phase. This study successfully synthesized an amorphous intergranular phase enhanced fluorapatite array controlled by Mg
(FAP-M) at room temperature. Furthermore, atom probe tomography (APT) observation presents that Mg
is enriched at grain boundaries during the assembly of enamel-like fluorapatite arrays, leading to the formation of intergranular phases of Mg-rich amorphous calcium phosphate (Mg-ACP). APT results also demonstrated that the segregation of Mg
caused the chemical gradient in nanocrystalline attachment and realignment under the drive of inherent surface stress. These results indicate that the amorphous intergranular phases served like glue to connect each nanorod to reinforce the enamel-like arrays. Therefore, the as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus of 2.90 ± 0.13 GPa and 67.9 ± 3.4 GPa, which were ∼8.3 and 2.2 times higher than those of FAP arrays without controlled by Mg
, respectively. |
| doi_str_mv | 10.1021/acsnano.2c00688 |
| format | Article |
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(FAP-M) at room temperature. Furthermore, atom probe tomography (APT) observation presents that Mg
is enriched at grain boundaries during the assembly of enamel-like fluorapatite arrays, leading to the formation of intergranular phases of Mg-rich amorphous calcium phosphate (Mg-ACP). APT results also demonstrated that the segregation of Mg
caused the chemical gradient in nanocrystalline attachment and realignment under the drive of inherent surface stress. These results indicate that the amorphous intergranular phases served like glue to connect each nanorod to reinforce the enamel-like arrays. Therefore, the as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus of 2.90 ± 0.13 GPa and 67.9 ± 3.4 GPa, which were ∼8.3 and 2.2 times higher than those of FAP arrays without controlled by Mg
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(FAP-M) at room temperature. Furthermore, atom probe tomography (APT) observation presents that Mg
is enriched at grain boundaries during the assembly of enamel-like fluorapatite arrays, leading to the formation of intergranular phases of Mg-rich amorphous calcium phosphate (Mg-ACP). APT results also demonstrated that the segregation of Mg
caused the chemical gradient in nanocrystalline attachment and realignment under the drive of inherent surface stress. These results indicate that the amorphous intergranular phases served like glue to connect each nanorod to reinforce the enamel-like arrays. Therefore, the as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus of 2.90 ± 0.13 GPa and 67.9 ± 3.4 GPa, which were ∼8.3 and 2.2 times higher than those of FAP arrays without controlled by Mg
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(FAP-M) at room temperature. Furthermore, atom probe tomography (APT) observation presents that Mg
is enriched at grain boundaries during the assembly of enamel-like fluorapatite arrays, leading to the formation of intergranular phases of Mg-rich amorphous calcium phosphate (Mg-ACP). APT results also demonstrated that the segregation of Mg
caused the chemical gradient in nanocrystalline attachment and realignment under the drive of inherent surface stress. These results indicate that the amorphous intergranular phases served like glue to connect each nanorod to reinforce the enamel-like arrays. Therefore, the as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus of 2.90 ± 0.13 GPa and 67.9 ± 3.4 GPa, which were ∼8.3 and 2.2 times higher than those of FAP arrays without controlled by Mg
, respectively.</abstract><cop>United States</cop><pmid>35802535</pmid><doi>10.1021/acsnano.2c00688</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-4310-9247</orcidid><orcidid>https://orcid.org/0000-0002-4032-9674</orcidid></addata></record> |
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| issn | 1936-0851 1936-086X |
| language | eng |
| recordid | cdi_crossref_primary_10_1021_acsnano_2c00688 |
| source | MEDLINE; ACS Publications |
| subjects | Apatites Dental Enamel Hardness |
| title | Mechanically Reinforced Artificial Enamel by Mg 2+ -Induced Amorphous Intergranular Phases |
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