Media Cold Warriors: How the Pedro Panes Reinforced Cold War Policies toward Cuba

Latin American Studie

Effect of Polymer Coatings as Intermediate Binders on Sintering of Ceramic Parts

It has been proposed that a thin polymer layer applied to the surfaces of finely divided ceramic powders would serve as a suitable intermediate binder for Selective Layer Sintering of ceramic pans. In this study, the effects of completeness and fraction of coa nd particle size distribution on sintering rates and strengths of coated ridized glass are examined. The effect of the coating as a binder during Selective Layer Sintering as well as the binder's burnout capability during post processing steps are also investigated.Mechanical Engineerin

Post-Processing of Selective Laser Sintered Polycarbonate Parts

St\ldies were conducted·to det~rmine the effect of press\lre onpost-prpeessingofpolycarbonate coupons. No significant differences betweencou.pons processed at atmospheric •cQndidons.. andcouponsprpeessedin.vacuum were •observed. However, anisotropic shrinkage .was observedin.thez-directionnormal to thesintering plane. Thisphenomenawasfurtl1erinvestigated usingsYIllmetrical polycarbonatecubespr9(iuced by Selective LaserSintering using yariedlas~rpoweryariedpowderlayer thickness, and varied powder bed temperaturesMechanical Engineerin

Value of Quaker Religious Thought to Me and to Friends

Excerpt: Quantitatively speaking, if it were not for Quaker Religious Thought, my credentials as a published scholar would be slim indeed. By the time I reached the age of 65, they would have consisted of one published lecture (the 1968 Shrewsbury Lecture) and one book review (in the Anglican Theological Review. Everything else — articles, comments, book reviews, editorials — had been published in QRT

Man as a resource on the moon

Human performance at operational lunar bas

Public Relations of Academic Libraries

published or submitted for publicatio

Drying of Colloidal Binder Infiltrated Ceramic Green Parts Produced by Selective Laser Sintering™

Colloidal ceramic binders have been used to strengthen ceramic green shapes produced by Selective Laser Sintering. This paper focuses on the effectiveness of the colloid infiltration with respect to the physical properties of the colloidal binder. Mass gains, strength gains, and dimensional changes resulting from infiltration were monitored. Controlled drying experiments were conducted to predict the factors influencing drying times for complex shapes.Mechanical Engineerin

Laser Sintering Model for Composite Materials

A computer model for the sintering of ceramic/polymer composite materials has been established based on empirical sintering rate data. The model calculates sintering depths which result from variations in the operating parameters which include laser power, beam speed, scan spacing, scan vector length, and initial temperatures of the powder and surroundings. Sintering depths measured in multiple layer parts made of polymer coated ceramic powders are compared to sintering depths calculated by the sintering model.Mechanical Engineerin