Application of SHS in the Manufacture of (NiAl/Ni3Al)/TiB2 Composite

Abstract

The aim of this study was to demonstrate the advantages and the method of application of the SHS process in the manufacture of (NiAl/Ni 3 Al)/TiB 2 composites. A comparison was made between sinters manufactured by FAST/SPS using two different routes to process the substrates, which formed the composite matrix. The evaluation criteria were based on measurements of selected physical, mechanical, and tribological properties, and on microstructure examinations. The evaluation has indicated a preferable method for the manufacture of composites, where the SHS reaction takes place during compaction of the powder mixture. This produces a sinter characterized not only by the high degree of sintering, and high values of the Young's modulus and HV1 hardness, but also by the satisfactory resistance to tribological wear. Additionally, the use of this process saves energy and reduces product-making cost, owing to a less expensive technique of making individual substrates.

Effect of Reactive SPS on the Microstructure and Properties of a Dual-Phase Ni-Al Intermetallic Compound and Ni-Al-TiB2 Composite

“…This is particularly visible in the Ni 3 Al phase, but mainly because of its bright colour. The Ni 3 Al phase was also harder and more brittle (a fact confirmed by previous studies [ 57 ]), which resulted in the formation of microcracks within the area of the phase itself or at the NiAl phase boundary, leading to the propagation of cracks and, finally, to the destruction of material.…”

Corrosion Resistance of Nickel-Aluminum Sinters Produced by High-Pressure HPHT/SPS Method

“…Special attention in the manufacture of Ni-Al Materials 2023, 16,1907 2 of 21 alloys deserves the technology of powder metallurgy as an important tool that allows abating the adverse effect of brittleness [2] through the use of various manufacturing methods [20,21], microstructure optimization [22,23] or ultra-fine grain refinement [24]. Numerous variations of the sintering process have been used to meet this goal, starting with free sintering [25,26], through the techniques that use both high sintering temperatures (HP-hot pressing, HIP-hot isostatic pressing) [22,27,28] and high sintering pressure (HPHT-high pressure high temperature) [29,30], and ending in the methods where thermal effects are obtained by the use of direct current, alternating current or pulsed current (SPS-spark plasma sintering) [31][32][33]. Currently, scientists are particularly interested in the SPS method.…”

Эволюция структурно-фазового состояния и микротвердости приповерхностного слоя композита Ni3Al – 30 об.% TiC при воздействии низкоэнергетического сильноточного электронного пучка

“…В последние годы в качестве материала матрицы предложено использовать интерметаллиды системы Ni-Al, а именно NiAl и Ni 3 Al [1][2][3][4][5]. Композиты с интерметаллидной матрицей проявляют отличные свойства при высоких температурах, в том числе высокую термическую стабильность, высокое сопротивление окислению, коррозии и абразивному износу, высокую прочность из-за аномальной температурной зависимости [6]. Композиты с матрицей из NiAl и Ni 3 Al получают различными методами порошковой металлургии.…”

“…Композиты с матрицей из NiAl и Ni 3 Al получают различными методами порошковой металлургии. Особый интерес среди отмеченных методов вызывает метод саморас-пространяющегося высокотемпературного синтеза (СВС) в режиме теплового взрыва с одновременным приложением давления [6][7][8][9][10][11][12]. Метод СВС характеризуется простотой, низкой стоимостью и высокой скоростью, поэтому является привлекательным для синтеза композитов с интерметаллидной матрицей.…”