PIM International, Vol. 11 No. 4 December 2017
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The 100-page December 2017 issue of Powder Injection Moulding International (Vol. 11 No. 4) includes the following news reports, articles and technical reviews:
MIM in the aerospace industry: Fresh perspectives and new opportunities
The aerospace industry has long been recognised as an important potential market for Metal Injection Moulding. However, this sector’s unique requirements, combined with the limited public exposure given to successful applications to-date, have resulted in low market penetration.
As Dr David Whittaker reports, a Special Interest Seminar held at the Euro PM2017 Congress, October 1-5, 2017, sought to highlight some of the opportunities and challenges offered by this market from the perspective of aerospace OEMs and a MIM parts producer.
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PMTi 2017 Xi’an: Titanium MIM comes of age as Additive Manufacturing drives awareness
The PM Titanium conference series, first held in Brisbane, Australia, in 2011 and then in Hamilton, New Zealand (2013) and Lüneburg, Germany (2015), is a key international event for those involved in the powder metallurgical processing of titanium and its alloys.
MIM has been a leading topic within the conference since the start and, as Dr Thomas Ebel reports, it is a technology that is not only maturing in its ability to reach the necessary material properties, but also in regard to the commercial availability of powders and feedstocks. This combination, together with a growing appreciation of metal powder-based manufacturing thanks to the rise of AM, paints a positive outlook for the industry.
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Isotropic NdFeB hard magnets: MIM production using recycled powders with and without Nd additions
Global demand for high performance net-shape NdFeB hard magnets is growing at a rapid pace – thanks, in part, to the move towards electrification in vehicles. Metal Injection Moulding is a unique net-shape processing route that is not only highly efficient in terms of material usage, but also offers the potential to use fully recycled raw materials.
Carlo Burkhardt and colleagues from the EU’s REProMag project report on an initial evaluation of the MIM processing for this material and highlight areas for future development.
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Optimising Metal Injection Moulding feedstock properties using capillary rheometry
Critical to the success of the MIM process is an understanding of the rheological properties of the binder and metal powder feedstock used. These influence the homogeneity of the molten feedstock, impacting on how well it fills a mould cavity and ultimately the mechanical properties of the final sintered component.
In this article Dr John Duffy, Product Marketing Manager at Malvern Panalytical, outlines the role of capillary rheometry when characterising and optimising the properties of MIM feedstocks and highlights rheological features that are desirable, along with insights into how they can be achieved.
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MIM of nickel-free nitrogen strengthened austenitic stainless steel from biopolymer based feedstock
Nickel-free stainless steels are of high interest for medical and dental applications, as well as consumer goods where contact with the skin is a consideration. In this paper Prof Efraín Carreño-Morelli and colleagues from the University of Applied Sciences and Arts Western Switzerland evaluate the MIM processing of the high-nitrogen content austenitic stainless steel P558. This is processed using a novel environmentally friendly binder that incorporates a polymer produced by bacterial fermentation.
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