Photopolymerization Reactions

doi:10.1002/9783527648245.ch4

Cited by 5 publications

(1 citation statement)

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“…With the help of CAM or CAD software, a UV laser is used to draw a pre-programmed design or shape on the surface of the photopolymer resin [19]. The photosensitive resin is sensitive to ultraviolet light, so the resin can photochemically solidify and form a single layer of the desired 3D object [20]. This process can be repeated in each layer of the design until the 3D object is completed.…”

Section: Introductionmentioning

confidence: 99%

THE SHRINKAGE, PHASE COMPOSITION AND MECHANICAL PROPERTIES OF CERAMICS WITH DIFFERENT β-SiAlON MAIN CRYSTALLINE PHASES PREPARED BY STEREOLITHOGRAPHY

Tian¹

2020

Ceramics - Silikaty

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In this paper, using Si 3 N 4 , Al 2 O 3 and AlN particles as raw materials, β-SiAlON ceramics with different main crystal phases were designed. The green body of the β-SiAlON-matrix ceramic samples were obtained by using stereolithography (SLA) additive manufacturing. After degreasing, dense β-SiAlON ceramics with different SiAlON phases were fabricated through gas pressure sintering at 1800 °C for 1 hour at GPa. The effects of the different Al 2 O 3 contents on the shrinkage, phase composition, relative density, microstructure, mechanical property and hardness were studied. The results indicate that the main phase of the ceramics was β-SiAlON and the specific chemical compositions of it were Si 5 AlON 7 , Si 3.1 Al 2.9 O 2.9 N 5.1 and Si 2 Al 4 O 4 N 4 . The intergranular phases that exists were mainly Y 3 Al 5 O 12 , YAlO 3 and Al 2 O 3 . With a relative density of 90.03 %, the Vickers hardness (Hv5), bending strength and fracture toughness of the fabricated β-Si 5 AlON 7 ceramics were 16.8 GPa, 465 MPa and 4.84 MPa•m 1/2 , respectively. Meanwhile, the shrinkage of the materials was 28.7 %

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Section: Introductionmentioning

confidence: 99%