SU436875A1 - The mixture to obtain crystals of solid solutions of non-metals in aluminides of transition metals - Google Patents

Description

(54) CHARGE PREPARATION FOR OBTAINING CRYSTALS OF SOLID NONMETAL SOLUTIONS IN ALUMINID TRANSITION

METALS

 at. %; Ti-A1-Si, at. %; Ti-AI-S, at. %; V (R1) -Al-Si, Al-75 at. % i).

Example 1. The mixture to obtain a solid solution of Si with a content of more than 1 weight. % in UA1 and 75 at. % AL

The lower limits of the content of the transition metal and non-metal in the mixture per 100 weight. h. VAls correspond to 6 wt. hours and 0.16 weight. . h. The lower limit of the group IV-VII transition metal corresponds to the liquidus point on the transition metal-aluminum state diagram at the applied temperature of the process for obtaining crystals of solid solutions. For example, for V at 1040 ° C, it corresponds to the V-Ai 5, 7 weight diagram. % (or 6 wt. h. V), and the lower limit of the non-metal is 1 wt. % by weight of the aluminide formed by the taken amount of the transition metal, i.e., in this case, for Si it is equal to 0.16 weight. h., since 6 wt. am A1 form 13.5 wt. h VAU. Thus, to obtain VAla containing Si more than 1 weight. % The mixture consists of 10 wt. h. A1, 6 wt. h. V and 0.16 weight. h. Si.

Example 2. A mixture to obtain a solid solution B containing more than I weight. % in HfAIa containing 75 at. % A1.

The content of the non-metal in the mixture, as follows from the claims, is determined by the content of the transition metal lying within 6-75 weight. h. Select in the Hf-Al-B system the amount of Hf equal, for example, 36 wt. h., we find the weight of the NGAC aluminide formed by it (52.3 wt. h), from which the lower limit of the B content is 5 wt. h. (i.e. 1 wt.% by weight of HfAls). The upper limit (25 wt.% By weight of HfAls) is 13 wt. h. From here we choose the number B in the charge equal to, for example, 6 weight. h. Composition

the mixture, thus, to obtain HfAla containing more than 1 weight. % In the next: A1 100 wt. h., Hf 36 wt. h., 6 wt. h. Example 3. The mixture to obtain a solid solution C with a content of more than 1 weight. % in TaA3, containing 75 at. % A1.

The upper limits of the content of the transition metal and non-metal in the charge per 100 weight. h. A1 is 74 wt. h. and 27 wt. h. Upper

the limit for the transition metal is obtained from the calculation of the formation of aluminide from one third of the amount of A1 (100 parts by weight), i.e. out of 33 weight. h. A1. In the Ta-A1-C system, this will be 106.7 wt. including TaAl3, in which 73.7 wt. h. ta A non-metal, i.e. C for the charge take 25 weight. including the number of TaAl, ie, 26.7 wt. h. Hence, the composition of the mixture to obtain TaAl3 containing more than 1 weight. % C is obtained as follows: A1

100 weight. h .. Ta 73.7 wt. hours, With 26.6 wt. h

Subject invention

Claims (2)

1. A mixture for obtaining crystals of solid solutions of non-metals in transition metal aluminides, containing aluminum, a transition metal of group IV-VII and a non-metal, characterized in that, in order to obtain crystals with a non-metal content of more than 1 weight. % and increase their aluminum content, it contains 100 weight. including aluminum, weight. %: Transition metal IV-VII groups 6,0-74,0 Nemetal 0.1-27.0 2. A mixture according to claim I, characterized in that, as a non-metal, it contains a substance selected from a series of boron, carbon and silicon.