Abstract:
A cermet and method of forming the cermet, the cermet including a Sialon and an alloy comprising nickel aluminide and boron, wherein the Sialon includes silicon aluminum oxynitride, and wherein at least a portion of the Sialon is bonded with at least a portion of the alloy. In one example, the cermet is about 70 weight percent to about 90 weight percent of the Sialon, and about 10 weight percent to about 30 weight percent of the alloy.
Abstract:
An anti-ballistic guard is provided and includes a rigid frame that includes an outer portion of rigid ballistic material and an inner portion that includes a pliable outer shell or housing that encompasses an inner thermally resistant core which is housed or contained within an inner shell or housing and a inner ballistic core which is housed or contained within an inner shell or housing. Secured to exterior portions of the inner portion housing are pluralities of attachment points that facilitate the securement of the inner portion to the rigid frame. In one design, the inner portion outer cover comprises flame retardant, high performance fibers such as arimid, O-PAN, or a combination of these, and other high performance fibers.
Abstract:
The present invention describes a cement free refractory mixture. The mixture comprises a pH buffer and a component containing a metal or fumed silica. Water may impart good flow characteristics to the mixture and can produce an effective low temperature cure. At elevated temperatures, an article formed using this mixture has superior refractory and physical properties.
Abstract:
Composite material, useful especially for manufacturing cutting tools, including a metal matrix containing strengthening particles, where the matrix is a titanium alloy including alloying elements chosen among copper, nickel, aluminium and their mixtures. It is preferred that the material of the matrix is cobalt free. The materials are useful for manufacturing cutting tools, as replacement of the conventional cobalt matrix composites and they go over the environmental and health risks related to the production and use of conventional cobalt based composites.
Abstract:
Embodiments of the present invention include methods of producing a composite article. A method comprises introducing a first powdered metal grade from a feed shoe into a first portion of a cavity in a die and a second powdered metal grade from the feed shoe into a second portion of the cavity, wherein the first powder metal grade differs from the second powdered metal grade in chemical composition or particle size. Further methods are also provided. Embodiments of the present invention also comprise composite inserts for material removal operations. The composite inserts may comprise a first region and a second region, wherein the first region comprises a first composite material and the second region comprises a second composite material.
Abstract:
The invention includes a cermet composition represented by the formula (PQ)(RS) comprising: a ceramic phase (PQ) and a binder phase (RS) wherein, P is a metal selected from the group consisting of Si, Mn, Fe, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and mixtures thereof, Q is nitride, R is a metal selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, S consists essentially of at least one element selected from Cr, Al, Si, and Y, and at least one reactive wetting aliovalent element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and mixtures thereof.
Abstract:
A creep resistant titanium aluminide alloy having fine particles such as boride particles at colony boundaries and/or grain boundary equiaxed structures. The alloy can include alloying additions such as
Abstract:
Die Erfindung betrifft einen Verbundwerkstoff, bestehend aus einem Hartmetall- oder Cermet-Substratkörper, der mit mindestens einer Diamantschicht überzogen ist. Um die Haftung der Diamantbeschichtung auf feinkörnigen Hartmetall- oder Cermet-Substratkörpern zu verbessern, wird vorgeschlagen, dass der C-Gehalt des Hartmetall- oder Cermet-Substratkörpers zwischen 89 % und 99 %, vorzugsweise zwischen 94 % und 99 %, des maximal möglichen Gehaltes, bei der C-Porosität auftritt, beträgt oder bei Hartmetall-Substtatkörpern mit Co-Binder die magnetische Sättigungspolarisation 89 bis 99 %, vorzugsweise 94 bis 99 % der maximalen magnetischen Sättigungspolarisation 4 π σmax = 2 Co - 2,2 Cr3C2 beträgt (Co und Cr3C2 jeweils in Massen-%, 4 π σmax in μT . m3 . kg-1 angegeben) beträgt.
Abstract:
A superhard filler hardmetal (10) having a superhard material filler (16), binder metal or matrix (12) and in some instances at least a first hard component (14) is disclosed. The superhard filler hardmetal (10) has a porosity rating of substantially A06, B00, C00 or better and may be essentially pore free, i.e., A00, B00, C00. The superhard filler hardmetal (10) is formed by mechanically mixing a superhard material (16), in some instances at least a first hard component (14) and a binder metal or matrix (12) precursor, shaping the mixture into a green body and consolidating the green body at a preselected temperature, superatmospheric pressure and time at temperature and time at superatmospheric pressure sufficient to form the superhard filler hardmetal (10). The consolidation preferably occurs without the formation of a liquid in the body and at least a portion of the time at superatmospheric pressure is at the preselected temperature. Diamond filler and boron nitride filler are examples of superhard materials usable as filler. The diamond filler may be coated (24) to prevent its degradation during consolidation and use. Boron nitride filler optionally may be coated.
Abstract:
A coated cemented carbide tool (20, 70), and a method for making the same, wherein the as-sintered substrate (30, 79) is formed by sintering in an atmosphere having at least a partial pressure and for a part of the time a nitrogen partial pressure.