Strength of Sintered Alumina (1st. Report)

Microstructure and mechanical properties of pressureless sintered alumina-silver composites

The silver toughened alumina ceramics, which were fabricated via a conventional ceramic processing route using commercially available alumina and silver oxide powders as the starting materials, exhibit a higher fracture toughness (6 to 9 MPamo.5) than the monolithic alumina ceramic ( 2.5 to 3.0 MPamo.5). The weak interfacial bonding between the silver inclusions and the alumina matrix is charac...

Strength evaluation of sintered ceramics by dynamic crack path model

Pancreas Transplantation and Report of 1st one in IRAN

SUMMARY Since 1923, the type I diabetic patients are treating with injections of insulin. Mortality of these patients decreased, comparing with noninsulin using patients, but many of them developed complications of diabetes mellitus, like nephropathy, retinopathy and neuropathy. The choice for treating this diseas and preventing its complications is pancrease transplantation, The 1st pancreas...

Deformation and Grain Growth of Low-Temperature-Sintered High-Purity Alumina

9 = 0.6 I / s ' 7 = 6.0 0 7 = 2 4 i ti 3 = 6 0 Through close control over green-state powder processing, pure alumina ceramics of 0.5-pm grain size were obtained by sintering at 1250°C. The static grain growth of this material was modest at temperatures below 1300°C. However, dynamic grain growth occurred rapidly during superplastic deformation. Therefore, although the ultrafine-grained alumina...

Flexural strength of the joint between glass-infiltrated alumina frames and the alumina-magnesia modifier.

PURPOSE The purpose of the present study was to evaluate the flexural strength of the joint between glass-infiltrated alumina frames and the experimental adjusting agent (MA modifier) that contains alumina and magnesia. METHODS A commercially available adjusting agent (Optimizer), a slurry of alumina powder (Alumina modifier), and a bulk specimen (joint-free alumina) were used as controls. Be...