Author Archives: John Duffy


Dr. John Duffy is Sector Marketing Manager - Industrial at Malvern Instruments and is based at the company's headquarters in the UK. He has a PhD from the University of Nottingham where his research in the school of chemical and environmental engineering involved rheological studies of the microstructure of molten coal. John received the Vernon Harrison award in 2009 from the British Society of Rheology for this work. This is an annual award based on the most distinguished PhD thesis on the subject of rheology. Previously he worked with both Boots and Unilever and has a wide experience of the role of rheology in household and personal care products.

Published 8 Oct 2019

Characterizing material properties for powder additive manufacturing

Up to one third of the production cost of an additive manufacturing (AM) component produced by powder bed processes (particularly metals) is the cost of the powder used, with commercial viability resting on a robust supply chain and effective powder…READ MORE >

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Published 28 Nov 2018

Characterizing metal powders for Additive Manufacturing

Additive manufacturing (AM), also commonly referred to as 3D printing is the process of building a three dimensional structure or component from the ground up, usually layer by layer. There are seven main categories of additive manufacturing processes, as defined…READ MORE >

Published 9 Nov 2018

Customer Spotlight: Optimizing polymer scaffold processes at Rutgers University

About Sanjeeva Murthy and the New Jersey center for Biomaterials at Rutgers University Sanjeeva Murthy is an Associate Research Professor at the New Jersey Center for Biomaterials (NJCBM), Rutgers University. He is a Materials Scientist with expertise in polymers, biomaterials…READ MORE >

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Published 4 Oct 2018

Using creep testing to determine viscoelastic information quickly and easily

The most common approach for measuring time-dependent viscoelastic properties of a material on a rotational rheometer is to perform small amplitude oscillatory shear (SAOS) over a range of oscillation frequencies – commonly referred to as a frequency sweep – where…READ MORE >

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Published 9 May 2017

IMI Inkjet School – Viscosity, Dispersions, Jetting & Surfaces

Controlling the performance of an ink is a complex optimization challenge. Understanding how features of the system, the dispersed particle size in particular, impact stability and behavior during each stage of the printing process is crucial for effective formulation. Over…READ MORE >

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