scholarly journals Fabrication of water-cooled laser silicon mirror by direct laser sintering

2014 ◽  
Vol 22 (8) ◽  
pp. 9902 ◽  
Author(s):  
Chongwen He ◽  
Haihong Zhu ◽  
Panpan Hu
Keyword(s):  
Laser Sintering ◽  
Direct Laser

scholarly journals CLINICAL EVALUATION OF COBALT-CHROMIUM-BASED FIXED DENTURES

2019 ◽  
Vol 15 (3) ◽  
pp. 146-151
Author(s):  
Арзу Керимова ◽  
Arzu Kerimova
Keyword(s):  
Survival Rate ◽  
Laser Sintering ◽  
High Wear Resistance ◽  
Marginal Adaptation ◽  
Direct Metal Laser Sintering ◽  
Cobalt Chromium ◽  
Proximal Caries ◽  
Direct Laser ◽  
Resistance To Deformation ◽  
Regional Adaptation

Subject. Ceramic-metal prostheses are distinguished by high wear resistance, resistance to deformation, and tight fit to the gums. However, there are relatively large differences in determining the success / survival of cobalt chromium based restorations. The article presents the results of a study of cobalt-chromium fixed dentures. Objectives — evaluate the effectiveness of cobalt-chromium fixed dentures made using the direct metal laser sintering (DMLS) technique. Material and methods. 32 patients (mean age 41.8 ± 2.46 years) were found to have 54 fixed cobalt-chromium fixed bridges made using direct laser sintering of metals. Dentures were evaluated between 6, 12, 24, 36 months according to G. Ryge criteria. The survival rate of restorations is calculated according to Kaplan-Meyer. Results. Assessment of fixed prostheses revealed the absence of criteria C and D in all 3 categories. A comparative analysis of prostheses showed no change in the period 6, 12, 24 months. After 36 months, chips that did not violate the function of the prosthesis were revealed in 5.5 % of cases, visible signs of a cleft in the category of “marginal adaptation” in 1.8 % of cases, edge discoloration of the surface in 3.7 % of cases. Radiographically, 1 patient showed signs of incipient proximal caries and periapical changes, respectively. During the study period of 6-24 months. survival rate was 1.0. The survival of the restoration over a 3-year period was 88.9 %. Conclusion. The frequency of cleavage was 5.5 %, which is comparable to the usual performance of ceramic-metal restorations. The visible signs of a cleft in the regional adaptation was 1.8 %, and the regional color mismatch was 3.7 %. 1.8 % of restoration was detected. Signs of incipient proximal caries were 1.8 %, periapical changes — 1.8 %. Survival was 88.9 %.

Formation of Copper-Based Metal Part via Direct Laser Sintering

2003 ◽  
Vol 437-438 ◽  
pp. 273-276 ◽  
Author(s):  
Xin Hua Wang ◽  
Jerry Y.H. Fuh ◽  
Yoke San Wong ◽  
L. Lu ◽  
H.T. Loh ◽  
...  
Keyword(s):  
Laser Sintering ◽  
Metal Part ◽  
Direct Laser

Characterisation of innovative materials for Direct Laser Sintering

2004 ◽  
Vol 860 ◽  
Author(s):  
E. Bassoli ◽  
A. Gatto ◽  
L. Iuliano ◽  
E. Atzeni
Keyword(s):  
Laser Sintering ◽  
Rapid Manufacturing ◽  
Cad Model ◽  
New Materials ◽  
Aluminium Composite ◽  
Direct Laser ◽  
Powder Deposition ◽  
End Products ◽  
Innovative Materials ◽  
Mechanical Performances

ABSTRACTThe performances achieved by Rapid Prototyping techniques are progressively leading towards Rapid Manufacturing, that is the capability to produce end products, directly from the CAD model. Even so, the diffusion of these techniques is hardly supported by scientific knowledge about the micro-mechanisms ruling the macroscopic performances of the part. In the present research, mechanical performances of new materials produced by Direct Laser Sintering technique have been studied: a Polyamide and an innovative Polyamide-Aluminium composite (Alumide). Specimens were produced with different orientations in regard to powder deposition plane and laser path, to investigate how the manufacturing anisotropy affects the part performances.

Direct laser sintering of Cu-based metal for rapid tooling

2007 ◽  
Vol 28 (1) ◽  
pp. 63
Author(s):  
Y. Tang ◽  
H.T. Loh ◽  
J.Y.H. Fuh ◽  
Y.S. Wong ◽  
L. Lu
Keyword(s):  
Laser Sintering ◽  
Rapid Tooling ◽  
Direct Laser

Effect of braze flux on direct laser sintering Cu-based metal powder

2006 ◽  
Vol 27 (2) ◽  
pp. 166-170 ◽  
Author(s):  
H.H. Zhu ◽  
L. Lu ◽  
J.Y.H. Fuh ◽  
C.C. Wu
Keyword(s):  
Metal Powder ◽  
Laser Sintering ◽  
Direct Laser

Direct Laser Sintering of Al2O3?SiO2Dental Ceramic Components by Layer-Wise Slurry Deposition

2006 ◽  
Vol 89 (10) ◽  
pp. 3076-3080 ◽  
Author(s):  
André Gahler ◽  
Jürgen G. Heinrich ◽  
Jens Günster
Keyword(s):  
Laser Sintering ◽  
Direct Laser ◽  
Ceramic Components
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